beta 3 and beta 4

Beta 4 is now out and will probably be the last of the beta series. We will start releasing release candidates soon so stay tuned. This beta is mostly just fixes and cleanups. In particular the Windows installer wasn't working as expected so if Bauble didn't work for you on Window please try again. That's what beta releases are for I guess.

Beta 4 and future versions of Bauble now require SQLAlchemy 0.4.3 and Python 2.5.