simpler customizer files section; adds glyphicons.less
Undo jank jump to docs section via side nav thing for all but h1s

While it worked, it overlaps content and makes links unclickable,
elements unselectable, etc. Le sad.
Nuke the repeated blog stuff and just point people to the upcoming post
Merge branch '3.0.0-wip' of github.com:twbs/bootstrap into 3.0.0-wip

Conflicts:
	getting-started.html