sqlalchemy 0.7.0

[Joel B. Mohler]

You may have noticed the release of sqlalchemy 0.7.0. I was pleased to find
that I only needed a very small bit of tweaks to have all tests passing on
version 0.7.0. These things have been committed and pushed. A new version
will likely appear on PyPi soon (subject to the documentation alluded to in
the next paragraph).

You may wonder if sqlalchemy 0.7.0 new event model applies to PyQtBindings.
I'm impressed with it, but I can't quite see how it applies in that form. One
issue is that sqlalchemy's attribute set event is before the attribute is set.
This is too early to notify the Qt model to update the UI. Additionally, I
find that I want an event after the attribute change to cascade changes to
related fields (which aren't in the database). I'd also like a unified event
model for sqlalchemy columns, UserAttr and simpler python attributes. Commit
7d76f37414ec is such an event model. While I like this model, it needs some
documentation. Here's hoping that gets done with-in the next 3 days.

Joel