Included three.js so example works
Fix script inclusions in index.html
- remove uncommitted pixelate effect
- add freeze effect
- remove unused color picker script
Allow effects to become "ready" even if unneeded sources are not ready
- simplified `setReady` and `setUnready` methods on EffectNode
- should make compositions load more gracefully, allowing for some sources to be loaded a little bit late
- unit test
- blend
- displacement
- fader
- freeze
- layers
- select
- split