Add source files
Add podspec
Add demo project
Add environment files, remove log debug
Add comments, clean up cruft
Fix test target
Fix test target in rakefile
Basic demo
Demo tweak
Refactor RZTween as protocol, RZKeyFrameTween as concrete class
Refactor into base keyframe implementation
Add clouds with parallax
Add tween color
Remove unnecessary layout call
Fix demo
Add start button tweening
Fix equality for hashing, modify demo
Rename keyframe tweens files, more demo updates
Starry awesome demo
Change comment on curves