Fixed bug in MySqlStream where too much data could attempt to be read (thanks Peter Belbin)

Implemented HasRows (thanks Nash Pherson).

Fixed bug where tables with more than 252 columns cause an exception (thanks Joshua Kessler).

Fixed bug where SQL statements ending in ; would cause a problem (thanks Shane Krueger).

Fixed bug in driver where error messages were getting truncated by 1 character (thanks Shane Krueger).

Made MySqlException serializable (thanks Mathias Hasselmann).