Log error when using invalid resources.
Move AnimationLoader to own file.
Use browserify to build a single js file.
Move code to lib folder like normal npm module.
Switch from Google WebFont loader to smnh's loader.

Smnh's loader works better with browserify.
Add Animation.step().
Allow loading animations after init.
Add animation tweaker.
Fix textboxes impossible to type in.
Only depend on files in lib.