Change the management system, from middleman to Yeoman

Conflicts:
	partials/_header.html.erb
	styles/docs.css
	styles/font/animation.css
	styles/font/fontello-codes.css
	styles/font/fontello-embedded.css
	styles/font/fontello-ie7-codes.css
	styles/font/fontello-ie7.css
	styles/font/fontello.css
Merge branch 'release/1.1'