Remove single stage stuff
Remove make_tags script
Merge branch 'develop' into doc
Update .gitignore
Work on state.py docstring
Make state attribute private with public accessor
Move master to state module
Massive state/menu refactor
Refactor out master module
Fix docstring
Refactor state module
Change SpriteDrawer layer implementation
Work on documentation
Fix up state module
Work on documentation
Add _public to sprite
Work on documentation
Make stage take weakrefs
Add scripts property
Add UI_GROUP to __all__