[firebird-python] Making SQLAlchemy 0.8.0b1 to work with FDB 0.9.x

[mariuz]

If you use SQLAlchemy 0.8.0b1 with fdb there is one issue loading the driver 
solved in the 
next release of SQLAlchemy

http://www.reddit.com/r/Python/comments/1400nh/firebird_python_driver_fdb_099_is_released/c78p7fy