registration 0.4 released

[Patrick Lewis]

I've released a new version of the registration templates. Key
changes are:

- Unit tests drop tables in a way that don't cause foreign key
conflicts
- Reorganized files into directories to reduce project clutter
- Added a delete_user controller to allow users to delete their
accounts.
- Registration tables must be explicitly created (no more auto-
creation)
- Made compatible with SqlAlchemy 0.4

The key feature (and the one driving the release) was that
registration was incompatible with the current version of SqlAlchemy.
If you use SqlAlchemy, the registration 0.4 release requires SA 0.4.

Going forward, there is a chance that some (much?) of the registration
stuff could get incorporated in one of the Google Summer of Code TG
projects. If this happens, great. If not, I plan on starting a new
branch that would work well a TG 1.1 project. This would mean dropping
SqlObject and Kid support, and adding SqlAlchemy, Genshi, and
ToscaWidget support.

If anyone runs into problems with the release, please don't hesitate
to post your problems here. Thanks.