Sandbox Testing

sandbox/testing

This branch has 2 (somewhat related) goals:

1. Increase the automated test coverage of the Trac code base using functional testing of user-visible features.
2. Provide a semi-stable version of Trac that follows /trunk as closely as it can.

Getting started: read sandbox/testing/TESTING-README

TODO

1. catch up
2. keep up, adding testcases for things fixed on trunk (to catch regressions)
3. update twill
4. refactor 1400-line trac/tests/functional.py
5. get it working on Windows (We are ignoring some rmtree failures we'd rather not ignore.)
6. propose merge to trunk