Revert "Temporarily revert README deletions from #13470,"

This reverts commit 54284a13c6b503d925bf6f75db2830f1af7fcf98.
Update cover.css

Moved the inset box-shadow to .site-wrapper in order to keep the shadow at the edges even if content exceeds viewport and needs scrolling.
fixes #13912: make radios/checkboxes work with inline forms again
Merge branch 'master' of github.com:twbs/bootstrap

Conflicts:
	dist/css/bootstrap.css.map
	dist/css/bootstrap.min.css
	docs/dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.min.css
Mozilla bug says the fix targeted v31
Merge pull request #13905 from Jimtrim/patch-1

Update cover.css
grunt
Merge pull request #13574 from twbs/reinstate-13470

Delete redundant Grunt info in README (Merge before shipping)
grunt
Merge branch 'master' of github.com:twbs/bootstrap
bump to v3.2.0
maxcdn urls
fix class names in popover live examples in docs
add comment explaining which demos this JS is for