add UUID support for Firebird

[Former user]

Since Firebird 2.1 there is a built-in function GEN_UUID that creates a 128bit UUID

Built in functions CHAR_TO_UUID2, UUID_TO_CHAR2

see doc/sql.extensions/README.builtin_functions.txt in your firebird installation

[Mike Bayer]

what's wrong with:

from sqlalchemy import func
func.GEN_UUID()
func.CHAR_TO_UUID2()
func.UUID_TO_CHAR2()

?

no sqlalchemy function is needed here.

if FB has a UUID type, we can add that. kinterbasdb should support it directly too.

[Mike Bayer]

probably moving firebird out in any case