[ent] Implement stub of Controllable focus functions in Biped
[vis] Don't need to glEnable(GL_TEXTURE_2D) if you're using shaders
[vis] Add a TODO comment :)
[geo vis] Move tiles GL program into vis
[vis] Separate common.* from sprites.*
[core geo vis] Provide transparently-loading opengl functions WHICH OUGHT TO BE PROVIDED BY ANY DECENT OPENGL API AND OH MY GOSH HOW ON EARTH DID IT WORK PERFECTLY THE FIRST TIME IT COMPILED
[vis] Forgot to add common.*.  git commit -a ruins me.
[hacc] Implement simple YAML-style parser-only references
[hacc] Update document test because files are now saved with indentation.
[ent] Use much-needed hacc references in small skel.  We might need partial path references though...
[rata -> world shell] Reorganization
[hacc] Add string_from_file and string_to_file
[core] Improve error message when failing to open image file
[core] Add stop and files commands