fixes issue after navbar is collapsed, dropdown-menus on uncollapsed menu are no longer visible
fuck aside and main elements, use divs so IE8 doesn't shit the bed
Merge branch '3.0.0-wip' of https://github.com/jharbert/bootstrap into jharbert-3.0.0-wip

Conflicts:
	dist/css/bootstrap.min.css
Merge branch '3.0.0-wip' of github.com:twbs/bootstrap into 3.0.0-wip