Removing the main content for 'why html5' it is not being maintained and the traffic is terrible #434
Removes all refernces to the 'why' section for #434
Merge branch 'whyhtml5' of https://github.com/PaulKinlan/www.html5rocks.com into PaulKinlan-whyhtml5

Conflicts:
	content/tutorials/canvas/integrating/en/index.html
	static/css/base.css