GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies of
this license document, but changing it is not allowed.

                            Preamble

  The GNU General Public License is a free, copyleft license for
software and other kinds of works.

  The licenses for most software and other practical works are
designed to take away your freedom to share and change the works.
By contrast, the GNU General Public License is intended to guarantee
your freedom to share and change all versions of a program--to make
sure it remains free software for all its users.  We, the Free
Software Foundation, use the GNU General Public License for most
of our software; it applies also to any other work released this
way by its authors.  You can apply it to your programs, too.

  When we speak of free software, we are referring to freedom, not
price.  Our General Public Licenses are designed to make sure that
you have the freedom to distribute copies of free software (and
charge for them if you wish), that you receive source code or can
get it if you want it, that you can change the software or use
pieces of it in new free programs, and that you know you can do
these things.

  To protect your rights, we need to prevent others from denying
you these rights or asking you to surrender the rights.  Therefore,
you have certain responsibilities if you distribute copies of the
software, or if you modify it: responsibilities to respect the
freedom of others.

  For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
freedoms that you received.  You must make sure that they, too,
receive or can get the source code.  And you must show them these
terms so they know their rights.

  Developers that use the GNU GPL protect your rights with two
steps: (1) assert copyright on the software, and (2) offer you this
License giving you legal permission to copy, distribute and/or
modify it.

  For the developers' and authors' protection, the GPL clearly
explains that there is no warranty for this free software.  For
both users' and authors' sake, the GPL requires that modified
versions be marked as changed, so that their problems will not be
attributed erroneously to authors of previous versions.

  Some devices are designed to deny users access to install or run
modified versions of the software inside them, although the
manufacturer can do so.  This is fundamentally incompatible with
the aim of protecting users' freedom to change the software.  The
systematic pattern of such abuse occurs in the area of products for
individuals to use, which is precisely where it is most unacceptable.
Therefore, we have designed this version of the GPL to prohibit the
practice for those products.  If such problems arise substantially
in other domains, we stand ready to extend this provision to those
domains in future versions of the GPL, as needed to protect the
freedom of users.

  Finally, every program is threatened constantly by software
patents. States should not allow patents to restrict development
and use of software on general-purpose computers, but in those that
do, we wish to avoid the special danger that patents applied to a
free program could make it effectively proprietary.  To prevent
this, the GPL assures that patents cannot be used to render the
program non-free.

  The precise terms and conditions for copying, distribution and
modification follow.

                       TERMS AND CONDITIONS

  0. Definitions.

  "This License" refers to version 3 of the GNU General Public License.

  "Copyright" also means copyright-like laws that apply to other kinds
of works, such as semiconductor masks.

  "The Program" refers to any copyrightable work licensed under this
License.  Each licensee is addressed as "you".  "Licensees" and
"recipients" may be individuals or organizations.

  To "modify" a work means to copy from or adapt all or part of the
work in a fashion requiring copyright permission, other than the
making of an exact copy.  The resulting work is called a "modified
version" of the earlier work or a work "based on" the earlier work.

  A "covered work" means either the unmodified Program or a work based
on the Program.

  To "propagate" a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
infringement under applicable copyright law, except executing it
on a computer or modifying a private copy.  Propagation includes
copying, distribution (with or without modification), making available
to the public, and in some countries other activities as well.

  To "convey" a work means any kind of propagation that enables other
parties to make or receive copies.  Mere interaction with a user
through a computer network, with no transfer of a copy, is not
conveying.

  An interactive user interface displays "Appropriate Legal Notices"
to the extent that it includes a convenient and prominently visible
feature that (1) displays an appropriate copyright notice, and (2)
tells the user that there is no warranty for the work (except to
the extent that warranties are provided), that licensees may convey
the work under this License, and how to view a copy of this License.
If the interface presents a list of user commands or options, such
as a menu, a prominent item in the list meets this criterion.

  1. Source Code.

  The "source code" for a work means the preferred form of the work
for making modifications to it.  "Object code" means any non-source
form of a work.

  A "Standard Interface" means an interface that either is an official
standard defined by a recognized standards body, or, in the case
of interfaces specified for a particular programming language, one
that is widely used among developers working in that language.

  The "System Libraries" of an executable work include anything, other
than the work as a whole, that (a) is included in the normal form
of packaging a Major Component, but which is not part of that Major
Component, and (b) serves only to enable use of the work with that
Major Component, or to implement a Standard Interface for which an
implementation is available to the public in source code form.  A
"Major Component", in this context, means a major essential component
(kernel, window system, and so on) of the specific operating system
(if any) on which the executable work runs, or a compiler used to
produce the work, or an object code interpreter used to run it.

  The "Corresponding Source" for a work in object code form means all
the source code needed to generate, install, and (for an executable
work) run the object code and to modify the work, including scripts
to control those activities.  However, it does not include the
work's System Libraries, or general-purpose tools or generally
available free programs which are used unmodified in performing
those activities but which are not part of the work.  For example,
Corresponding Source includes interface definition files associated
with source files for the work, and the source code for shared
libraries and dynamically linked subprograms that the work is
specifically designed to require, such as by intimate data communication
or control flow between those subprograms and other parts of the
work.

  The Corresponding Source need not include anything that users can
regenerate automatically from other parts of the Corresponding
Source.

  The Corresponding Source for a work in source code form is that
same work.

  2. Basic Permissions.

  All rights granted under this License are granted for the term of
copyright on the Program, and are irrevocable provided the stated
conditions are met.  This License explicitly affirms your unlimited
permission to run the unmodified Program.  The output from running
a covered work is covered by this License only if the output, given
its content, constitutes a covered work.  This License acknowledges
your rights of fair use or other equivalent, as provided by copyright
law.

  You may make, run and propagate covered works that you do not convey,
without conditions so long as your license otherwise remains in
force.  You may convey covered works to others for the sole purpose
of having them make modifications exclusively for you, or provide
you with facilities for running those works, provided that you
comply with the terms of this License in conveying all material for
which you do not control copyright.  Those thus making or running
the covered works for you must do so exclusively on your behalf,
under your direction and control, on terms that prohibit them from
making any copies of your copyrighted material outside their
relationship with you.

  Conveying under any other circumstances is permitted solely under
the conditions stated below.  Sublicensing is not allowed; section
10 makes it unnecessary.

  3. Protecting Users' Legal Rights From Anti-Circumvention Law.

  No covered work shall be deemed part of an effective technological
measure under any applicable law fulfilling obligations under article
11 of the WIPO copyright treaty adopted on 20 December 1996, or
similar laws prohibiting or restricting circumvention of such
measures.

  When you convey a covered work, you waive any legal power to forbid
circumvention of technological measures to the extent such circumvention
is effected by exercising rights under this License with respect
to the covered work, and you disclaim any intention to limit operation
or modification of the work as a means of enforcing, against the
work's users, your or third parties' legal rights to forbid
circumvention of technological measures.

  4. Conveying Verbatim Copies.

  You may convey verbatim copies of the Program's source code as you
receive it, in any medium, provided that you conspicuously and
appropriately publish on each copy an appropriate copyright notice;
keep intact all notices stating that this License and any non-permissive
terms added in accord with section 7 apply to the code; keep intact
all notices of the absence of any warranty; and give all recipients
a copy of this License along with the Program.

  You may charge any price or no price for each copy that you convey,
and you may offer support or warranty protection for a fee.

  5. Conveying Modified Source Versions.

  You may convey a work based on the Program, or the modifications
to produce it from the Program, in the form of source code under
the terms of section 4, provided that you also meet all of these
conditions:

    a) The work must carry prominent notices stating that you
    modified it, and giving a relevant date.

    b) The work must carry prominent notices stating that it is
    released under this License and any conditions added under
    section 7.  This requirement modifies the requirement in
    section 4 to "keep intact all notices".

    c) You must license the entire work, as a whole, under this
    License to anyone who comes into possession of a copy.  This
    License will therefore apply, along with any applicable section 7
    additional terms, to the whole of the work, and all its parts,
    regardless of how they are packaged.  This License gives no
    permission to license the work in any other way, but it does not
    invalidate such permission if you have separately received it.

    d) If the work has interactive user interfaces, each must display
    Appropriate Legal Notices; however, if the Program has
    interactive interfaces that do not display Appropriate Legal
    Notices, your work need not make them do so.

  A compilation of a covered work with other separate and independent
works, which are not by their nature extensions of the covered work,
and which are not combined with it such as to form a larger program,
in or on a volume of a storage or distribution medium, is called
an "aggregate" if the compilation and its resulting copyright are
not used to limit the access or legal rights of the compilation's
users beyond what the individual works permit.  Inclusion of a
covered work in an aggregate does not cause this License to apply
to the other parts of the aggregate.

  6. Conveying Non-Source Forms.

  You may convey a covered work in object code form under the terms
of sections 4 and 5, provided that you also convey the machine-readable
Corresponding Source under the terms of this License, in one of
these ways:

    a) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by the
    Corresponding Source fixed on a durable physical medium
    customarily used for software interchange.

    b) Convey the object code in, or embodied in, a physical product
    (including a physical distribution medium), accompanied by a
    written offer, valid for at least three years and valid for as
    long as you offer spare parts or customer support for that
    product model, to give anyone who possesses the object code
    either (1) a copy of the Corresponding Source for all the
    software in the product that is covered by this License, on a
    durable physical medium customarily used for software
    interchange, for a price no more than your reasonable cost
    of physically performing this conveying of source, or (2)
    access to copy the Corresponding Source from a network server
    at no charge.

    c) Convey individual copies of the object code with a copy of the
    written offer to provide the Corresponding Source.  This
    alternative is allowed only occasionally and noncommercially, and
    only if you received the object code with such an offer, in
    accord with subsection 6b.

    d) Convey the object code by offering access from a designated
    place (gratis or for a charge), and offer equivalent access to
    the Corresponding Source in the same way through the same place
    at no further charge.  You need not require recipients to copy
    the Corresponding Source along with the object code.  If the
    place to copy the object code is a network server, the
    Corresponding Source may be on a different server (operated
    by you or a third party) that supports equivalent copying
    facilities, provided you maintain clear directions next to the
    object code saying where to find the Corresponding Source.
    Regardless of what server hosts the Corresponding Source, you
    remain obligated to ensure that it is available for as long
    as needed to satisfy these requirements.

    e) Convey the object code using peer-to-peer transmission,
    provided you inform other peers where the object code and
    Corresponding Source of the work are being offered to the
    general public at no charge under subsection 6d.

  A separable portion of the object code, whose source code is excluded
from the Corresponding Source as a System Library, need not be
included in conveying the object code work.

  A "User Product" is either (1) a "consumer product", which means
any tangible personal property which is normally used for personal,
family, or household purposes, or (2) anything designed or sold for
incorporation into a dwelling.  In determining whether a product
is a consumer product, doubtful cases shall be resolved in favor
of coverage.  For a particular product received by a particular
user, "normally used" refers to a typical or common use of that
class of product, regardless of the status of the particular user
or of the way in which the particular user actually uses, or expects
or is expected to use, the product.  A product is a consumer product
regardless of whether the product has substantial commercial,
industrial or non-consumer uses, unless such uses represent the
only significant mode of use of the product.

  "Installation Information" for a User Product means any methods,
procedures, authorization keys, or other information required to
install and execute modified versions of a covered work in that
User Product from a modified version of its Corresponding Source.
The information must suffice to ensure that the continued functioning
of the modified object code is in no case prevented or interfered
with solely because modification has been made.

  If you convey an object code work under this section in, or with,
or specifically for use in, a User Product, and the conveying occurs
as part of a transaction in which the right of possession and use
of the User Product is transferred to the recipient in perpetuity
or for a fixed term (regardless of how the transaction is characterized),
the Corresponding Source conveyed under this section must be
accompanied by the Installation Information.  But this requirement
does not apply if neither you nor any third party retains the ability
to install modified object code on the User Product (for example,
the work has been installed in ROM).

  The requirement to provide Installation Information does not include
a requirement to continue to provide support service, warranty, or
updates for a work that has been modified or installed by the
recipient, or for the User Product in which it has been modified
or installed.  Access to a network may be denied when the modification
itself materially and adversely affects the operation of the network
or violates the rules and protocols for communication across the
network.

  Corresponding Source conveyed, and Installation Information provided,
in accord with this section must be in a format that is publicly
documented (and with an implementation available to the public in
source code form), and must require no special password or key for
unpacking, reading or copying.

  7. Additional Terms.

  "Additional permissions" are terms that supplement the terms of
this License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program
shall be treated as though they were included in this License, to
the extent that they are valid under applicable law.  If additional
permissions apply only to part of the Program, that part may be
used separately under those permissions, but the entire Program
remains governed by this License without regard to the additional
permissions.

  When you convey a copy of a covered work, you may at your option
remove any additional permissions from that copy, or from any part
of it.  (Additional permissions may be written to require their own
removal in certain cases when you modify the work.)  You may place
additional permissions on material, added by you to a covered work,
for which you have or can give appropriate copyright permission.

  Notwithstanding any other provision of this License, for material
you add to a covered work, you may (if authorized by the copyright
holders of that material) supplement the terms of this License with
terms:

    a) Disclaiming warranty or limiting liability differently from
    the terms of sections 15 and 16 of this License; or

    b) Requiring preservation of specified reasonable legal notices
    or author attributions in that material or in the Appropriate
    Legal Notices displayed by works containing it; or

    c) Prohibiting misrepresentation of the origin of that material,
    or requiring that modified versions of such material be marked
    in reasonable ways as different from the original version; or

    d) Limiting the use for publicity purposes of names of licensors
    or authors of the material; or

    e) Declining to grant rights under trademark law for use of some
    trade names, trademarks, or service marks; or

    f) Requiring indemnification of licensors and authors of that
    material by anyone who conveys the material (or modified versions
    of it) with contractual assumptions of liability to the
    recipient, for any liability that these contractual assumptions
    directly impose on those licensors and authors.

  All other non-permissive additional terms are considered "further
restrictions" within the meaning of section 10.  If the Program as
you received it, or any part of it, contains a notice stating that
it is governed by this License along with a term that is a further
restriction, you may remove that term.  If a license document
contains a further restriction but permits relicensing or conveying
under this License, you may add to a covered work material governed
by the terms of that license document, provided that the further
restriction does not survive such relicensing or conveying.

  If you add terms to a covered work in accord with this section, you
must place, in the relevant source files, a statement of the
additional terms that apply to those files, or a notice indicating
where to find the applicable terms.

  Additional terms, permissive or non-permissive, may be stated in
the form of a separately written license, or stated as exceptions;
the above requirements apply either way.

  8. Termination.

  You may not propagate or modify a covered work except as expressly
provided under this License.  Any attempt otherwise to propagate
or modify it is void, and will automatically terminate your rights
under this License (including any patent licenses granted under the
third paragraph of section 11).

  However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
provisionally, unless and until the copyright holder explicitly and
finally terminates your license, and (b) permanently, if the copyright
holder fails to notify you of the violation by some reasonable means
prior to 60 days after the cessation.

  Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from
that copyright holder, and you cure the violation prior to 30 days
after your receipt of the notice.

  Termination of your rights under this section does not terminate
the licenses of parties who have received copies or rights from you
under this License.  If your rights have been terminated and not
permanently reinstated, you do not qualify to receive new licenses
for the same material under section 10.

  9. Acceptance Not Required for Having Copies.

  You are not required to accept this License in order to receive or
run a copy of the Program.  Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance.  However,
nothing other than this License grants you permission to propagate or
modify any covered work.  These actions infringe copyright if you do
not accept this License.  Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.

  10. Automatic Licensing of Downstream Recipients.

  Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License.  You are not responsible
for enforcing compliance by third parties with this License.

  An "entity transaction" is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
organization, or merging organizations.  If propagation of a covered
work results from an entity transaction, each party to that
transaction who receives a copy of the work also receives whatever
licenses to the work the party's predecessor in interest had or could
give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest, if
the predecessor has it or can get it with reasonable efforts.

  You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License.  For example, you
may not impose a license fee, royalty, or other charge for exercise
of rights granted under this License, and you may not initiate
litigation (including a cross-claim or counterclaim in a lawsuit)
alleging that any patent claim is infringed by making, using,
selling, offering for sale, or importing the Program or any portion
of it.

  11. Patents.

  A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based.  The
work thus licensed is called the contributor's "contributor version".

  A contributor's "essential patent claims" are all patent claims
owned or controlled by the contributor, whether already acquired
or hereafter acquired, that would be infringed by some manner,
permitted by this License, of making, using, or selling its contributor
version, but do not include claims that would be infringed only as
a consequence of further modification of the contributor version.
For purposes of this definition, "control" includes the right to
grant patent sublicenses in a manner consistent with the requirements
of this License.

  Each contributor grants you a non-exclusive, worldwide, royalty-free
patent license under the contributor's essential patent claims, to
make, use, sell, offer for sale, import and otherwise run, modify
and propagate the contents of its contributor version.

  In the following three paragraphs, a "patent license" is any express
agreement or commitment, however denominated, not to enforce a
patent (such as an express permission to practice a patent or
covenant not to sue for patent infringement).  To "grant" such a
patent license to a party means to make such an agreement or
commitment not to enforce a patent against the party.

  If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through
a publicly available network server or other readily accessible
means, then you must either (1) cause the Corresponding Source to
be so available, or (2) arrange to deprive yourself of the benefit
of the patent license for this particular work, or (3) arrange, in
a manner consistent with the requirements of this License, to extend
the patent license to downstream recipients.  "Knowingly relying"
means you have actual knowledge that, but for the patent license,
your conveying the covered work in a country, or your recipient's
use of the covered work in a country, would infringe one or more
identifiable patents in that country that you have reason to believe
are valid.

  If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of,
a covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate,
modify or convey a specific copy of the covered work, then the
patent license you grant is automatically extended to all recipients
of the covered work and works based on it.

  A patent license is "discriminatory" if it does not include within
the scope of its coverage, prohibits the exercise of, or is conditioned
on the non-exercise of one or more of the rights that are specifically
granted under this License.  You may not convey a covered work if
you are a party to an arrangement with a third party that is in the
business of distributing software, under which you make payment to
the third party based on the extent of your activity of conveying
the work, and under which the third party grants, to any of the
parties who would receive the covered work from you, a discriminatory
patent license (a) in connection with copies of the covered work
conveyed by you (or copies made from those copies), or (b) primarily
for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.

Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.

  12. No Surrender of Others' Freedom.

  If conditions are imposed on you (whether by court order, agreement
or otherwise) that contradict the conditions of this License, they
do not excuse you from the conditions of this License.  If you
cannot convey a covered work so as to satisfy simultaneously your
obligations under this License and any other pertinent obligations,
then as a consequence you may not convey it at all.  For example,
if you agree to terms that obligate you to collect a royalty for
further conveying from those to whom you convey the Program, the
only way you could satisfy both those terms and this License would
be to refrain entirely from conveying the Program.

  13. Use with the GNU Affero General Public License.

  Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a
single combined work, and to convey the resulting work.  The terms
of this License will continue to apply to the part which is the
covered work, but the special requirements of the GNU Affero General
Public License, section 13, concerning interaction through a network
will apply to the combination as such.

  14. Revised Versions of this License.

  The Free Software Foundation may publish revised and/or new versions
of the GNU General Public License from time to time.  Such new
versions will be similar in spirit to the present version, but may
differ in detail to address new problems or concerns.

  Each version is given a distinguishing version number.  If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation.  If the Program does not specify a version number of
the GNU General Public License, you may choose any version ever
published by the Free Software Foundation.

  If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes
you to choose that version for the Program.

  Later license versions may give you additional or different
permissions.  However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow
a later version.

  15. Disclaimer of Warranty.

  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT
NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND
PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE PROGRAM PROVE
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR
OR CORRECTION.

  16. Limitation of Liability.

  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING
BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE
OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE
PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER
OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

  17. Interpretation of Sections 15 and 16.

  If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.

                     END OF TERMS AND CONDITIONS

            How to Apply These Terms to Your New Programs

  If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make
it free software which everyone can redistribute and change under
these terms.

To do so, attach the following notices to the program.  It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is
found.

    <one line to give the program's name and a brief idea of what it
    does.>
    Copyright (C) <year>  <name of author>

    This program is free software: you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation, either version 3
    of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see
    <http://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

  If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:

    <program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type 'show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type 'show c' for details.

The hypothetical commands 'show w' and 'show c' should show the
appropriate parts of the General Public License.  Of course, your
program's commands might be different; for a GUI interface, you
would use an "about box".

  You should also get your employer (if you work as a programmer) or
school, if any, to sign a "copyright disclaimer" for the program,
if necessary. For more information on this, and how to apply and
follow the GNU GPL, see <http://www.gnu.org/licenses/>.

The GNU General Public License does not permit incorporating your
program into proprietary programs.  If your program is a subroutine
library, you may consider it more useful to permit linking proprietary
applications with the library.  If this is what you want to do, use
the GNU Lesser General Public License instead of this License.  But
first, please read <http://www.gnu.org/philosophy/why-not-lgpl.html>.
==

==
GCC RUNTIME LIBRARY EXCEPTION

Version 3.1, 31 March 2009

Copyright © 2009 Free Software Foundation, Inc. <http://fsf.org/>

Everyone is permitted to copy and distribute verbatim copies of
this license document, but changing it is not allowed.

This GCC Runtime Library Exception ("Exception") is an additional
permission under section 7 of the GNU General Public License, version
3 ("GPLv3"). It applies to a given file (the "Runtime Library")
that bears a notice placed by the copyright holder of the file
stating that the file is governed by GPLv3 along with this Exception.

When you use GCC to compile a program, GCC may combine portions of
certain GCC header files and runtime libraries with the compiled
program. The purpose of this Exception is to allow compilation of
non-GPL (including proprietary) programs to use, in this way, the
header files and runtime libraries covered by this Exception.

0. Definitions.

A file is an "Independent Module" if it either requires the Runtime
Library for execution after a Compilation Process, or makes use of
an interface provided by the Runtime Library, but is not otherwise
based on the Runtime Library.

"GCC" means a version of the GNU Compiler Collection, with or without
modifications, governed by version 3 (or a specified later version)
of the GNU General Public License (GPL) with the option of using
any subsequent versions published by the FSF.

"GPL-compatible Software" is software whose conditions of propagation,
modification and use would permit combination with GCC in accord
with the license of GCC.

"Target Code" refers to output from any compiler for a real or
virtual target processor architecture, in executable form or suitable
for input to an assembler, loader, linker and/or execution phase.
Notwithstanding that, Target Code does not include data in any
format that is used as a compiler intermediate representation, or
used for producing a compiler intermediate representation.

The "Compilation Process" transforms code entirely represented in
non-intermediate languages designed for human-written code, and/or
in Java Virtual Machine byte code, into Target Code. Thus, for
example, use of source code generators and preprocessors need not
be considered part of the Compilation Process, since the Compilation
Process can be understood as starting with the output of the
generators or preprocessors.

A Compilation Process is "Eligible" if it is done using GCC, alone
or with other GPL-compatible software, or if it is done without
using any work based on GCC. For example, using non-GPL-compatible
Software to optimize any GCC intermediate representations would not
qualify as an Eligible Compilation Process.

1. Grant of Additional Permission.

You have permission to propagate a work of Target Code formed by
combining the Runtime Library with Independent Modules, even if
such propagation would otherwise violate the terms of GPLv3, provided
that all Target Code was generated by Eligible Compilation Processes.
You may then convey such a combination under terms of your choice,
consistent with the licensing of the Independent Modules.

2. No Weakening of GCC Copyleft.

The availability of this Exception does not imply any general
presumption that third-party software is unaffected by the copyleft
requirements of the license of GCC.
==

==
 Copyright (c) 1994
 Hewlett-Packard Company

 Permission to use, copy, modify, distribute and sell this software
 and its documentation for any purpose is hereby granted without fee,
 provided that the above copyright notice appear in all copies and
 that both that copyright notice and this permission notice appear
 in supporting documentation.  Hewlett-Packard Company makes no
 representations about the suitability of this software for any
 purpose.  It is provided "as is" without express or implied
 warranty.
==

==
 Copyright (c) 1996,1997
 Silicon Graphics Computer Systems, Inc.

 Permission to use, copy, modify, distribute and sell this software
 and its documentation for any purpose is hereby granted without fee,
 provided that the above copyright notice appear in all copies and
 that both that copyright notice and this permission notice appear
 in supporting documentation.  Silicon Graphics makes no
 representations about the suitability of this software for any
 purpose.  It is provided "as is" without express or implied
 warranty.
==

==
 shared_count.hpp
@  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.

 shared_ptr.hpp
 Copyright (C) 1998, 1999 Greg Colvin and Beman Dawes.
 Copyright (C) 2001, 2002, 2003 Peter Dimov

 weak_ptr.hpp
 Copyright (C) 2001, 2002, 2003 Peter Dimov

 enable_shared_from_this.hpp
 Copyright (C) 2002 Peter Dimov

Distributed under the Boost Software License, Version 1.0.

Boost Software License - Version 1.0 - August 17th, 2003

Permission is hereby granted, free of charge, to any person or
organization obtaining a copy of the software and accompanying
documentation covered by this license (the "Software") to use,
reproduce, display, distribute, execute, and transmit the Software,
and to prepare derivative works of the Software, and to permit
third-parties to whom the Software is furnished to do so, all subject
to the following:

The copyright notices in the Software and this entire statement,
including the above license grant, this restriction and the following
disclaimer, must be included in all copies of the Software, in whole
or in part, and all derivative works of the Software, unless such
copies or derivative works are solely in the form of machine-executable
object code generated by a source language processor.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND
NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR ANYONE
DISTRIBUTING THE SOFTWARE BE LIABLE FOR ANY DAMAGES OR OTHER
LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
==

==
Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.

Permission to use, copy, modify, sell, and distribute this software
is hereby granted without fee, provided that the above copyright
notice appears in all copies, and that both that copyright notice
and this permission notice appear in supporting documentation. None
of the above authors, nor IBM Haifa Research Laboratories, make any
representation about the suitability of this software for any
purpose. It is provided "as is" without express or implied warranty.
==

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