Added support for setting timeout value.

exec() now returns affected row count

Added lastInsertId() method for retrieving last insert id.
Made affectedRows() work for MySQL.
Populate error value in MySQL on error.

More errno stuff.

Fixed possible crash on connection error.

Simplify config via the use of mysql_config.
Fixed errno naming conflict.

Update prepare() prototype.
Attempt to hunt down the cause of a build warning under win32 by adjust the
name of the error function.

initial import of mysql 3.x pdo driver