[whatwg] Fullscreen revision I

[Anne van Kesteren]

I revised the specification based on the comments thus far:

   http://dvcs.w3.org/hg/fullscreen/raw-file/tip/Overview.html

I made the following changes:

* The root element is no longer a special case
* No longer any attempts at integrating with "F11 fullscreen"
* requestFullscreen() can no longer be invoked when already in "element  
fullscreen"
* Queued a task to fire an event on a per-document basis (because of  
cross-origin documents)
* Introduced event for requestFullscreen() failure (fullscreenerror)
* Improved the wording around requestFullscreen() failure
* Removed Document.fullscreen as it's a subset of  
Document.fullscreenElement

I realize this is not what everyone wants. But this seemed the simplest  
subset of what everyone desired and a pretty good start from where we can  
enhance going forward.

Kind regards,


-- 
Anne van Kesteren
http://annevankesteren.nl/