repository clean-up

[silnarm]

Just a heads up, as discussed with Daniel on IRC, I've done some housekeeping on the repo. So the lua_ext, openglui, tinyxml, refactor, & 0.2.12 branches are all gone, and 0.2.13 has been renamed 0.2.x

If you had any of those checked out, you'll want to switch or delete your working copies, and if you had 0.2.13 out, you will need to switch it (to 0.2.x).