Implemented a static class called Time that can be used to perform framerate independent animations and also will limit the framerate of MovieClips
Made Time not be a static object
Added a hook to set the targetFrameRate from auto detect. Also wrote some docs for target and min framerate
Merge branch 'time' of https://github.com/Jam3/pixi.js into Jam3-time

Conflicts:
	Gruntfile.js
	src/pixi/display/MovieClip.js
	src/pixi/display/Stage.js
	src/pixi/renderers/canvas/CanvasRenderer.js
	src/pixi/renderers/webgl/WebGLRenderer.js
	src/pixi/utils/Detector.js
Merge pull request #2 from mowday/Jam3-time

Pull in Jam3 Time