[SQLObject] Looking towards 0.5

[Luke O. <lu...@me...>]

To start a separate thread, I'd like to open up discussion for what new things
people are working on or considering for 0.5 (since 0.4 will be mostly a
maintenance release, as I count it new features are just improved createSQL
stuff and changes to Col to allow SQLObject inheritance to work properly.)

My thoughts for post-0.4:

* MemoryTransaction or an equivalent.

* Some decision on concurrency control/resolution (should SQLObject offer any,
and if so then let's do it.)

* Actual enforcement of a constraints/validators system, at least providing
toSQL/toPython functionality. (Ian, I know you've been busy on FormEncode, and
that will be a help here :)

That's all I've got for now.

- Luke