Added new Contributors guide.
Device.quirksMode is a boolean that informs you if the page is in strict (false) or quirks (true) mode.
Canvas.getOffset now runs a strict/quirks check and uses document.documentElement when calculating scrollTop and scrollLeft to avoid Chrome console warnings.
The Time class now has three new methods: addEvent, repeatEvent and loopEvent. See the new Timer examples to show how to use them.