Refactor example into library. Partially complete.
Work in progress.
Still refactoring. Some things still messy and not yet working.
Working. Needs more refactoring to clean up some gross API.
Merge branch 'library-refactor'
Add zoom to camera.
r+
Use plane position.
r+
add some snes mario artwork
get rid of the index texture! Tile planes shall now be 2-channel texture directly addressing the atlas texture.
default to non-repeat tile planes, can be overridden by options
add new mario test
add background color, misc fixes
remove remnants of index