added waterfall to sprites.xml
changed waterfall.png
merge develop
add waterfall to sprite json settings
makeshift getting waterfall animation to work
added animation to sprite sheet dictionary in sprite sheet loader
sped up waterfalls, lined up tiles
merge develop
added some documentation
removed unneeded sprite data digestion function
changed collisionize to activate
rewrite some code to use lodash
changed some this's to self's
completed some tilemap animation refactoring, added more waterfalls to test