Partially implemented filter effects

Implemented ghost effect
Added color and brightness effects
Delete .DS_Store
Delete .DS_Store
Delete .DS_Store
Fixed Safari Bug
Removed evil evals

Filters now reset when the stop button is clicked.
Fixed mistake in code
Merge github.com:djdolphin/scratch-html5 into test

Also improved filter performance, fixed edge cases, and implemented stage filters for color, brightness, and ghost.

Conflicts:
	js/Runtime.js
	js/Sprite.js
    js/primitives/LooksPrims.js

Tested with:
	http://scratch.mit.edu/projects/14315832/