[core] Integrate with GLEW better.
[shell] Rename Resident Editor to Room Editor
[shell] Menu items check bounds on clicks themselves.
[geo] Fix set_room crashing when old room was NULL
[shell] Implement SubMenu
[hacc] Make File(string) constructor init-safe.
[shell] Reorganize shell a bit.
Merge branch 'forrealz' of github.com:quietfanatic/rata into forrealz
[core] Don't create temporary objects for set and add commands
[hacc] Allow non-throwing type coercions.
[shell] Add re_new_actor
[ent] Give Biped::def default of NULL
[shell] Actually populate new actor.
[shell] Properly position new actors.