evt and bubble is optional
getCanvas, getHitCanvas and getContext is Layer methods right?
toDataURL don't need callback. It is sync function.
toImage don't return image - because async.
Container's `add` return this
find returns Collection
hasChildren returns Boolean
getPointerPosition return object
tween methods are chainable
Ellipse radius typo?
ring have no angle conf
all methods are now copied to Collection prototype so that you don't have to use the each() method all the time
collections are now chainable
hooked bower json file generation to full grunt build.  added minified build so root directory
Merge pull request #739 from lavrton/docImprove

Doc improve
reenabling all tests
introduced new alpha component for colors.  fixed #755.  Created new validators namespace for getter setter validator functions
added new after func for factor setters.  The filters can now hook into after, rather than a validator
updated docs
fixed #769