Prevent the font shorthand from getting compiled as division
simplify tables.less
Fix responsive utilities for table elements

This change prevents situations where specificity causes some rules to
be overridden by the ones intended for mobile.
* Added mixin `responsive-invisibility()`
* Swapped out `display: none !important;` for new mixin
Make more components mixin-friendly
Merge branch '3.0.0-wip' of github.com:twitter/bootstrap into 3.0.0-wip
fixes #7367: slightly larger carousel indicators
fixes #8068: add .help-block to form field state mixin
Merge pull request #8352 from liuyl/simplifytable

simplify tables.less
fixes #8345: use inline-block on .img-responsive
Merge pull request #8348 from Rowno/compiled-font-shorthand

Prevent the font shorthand from getting compiled as division
Fixes #8350: unfuck Chrome number input element cursor /cc @cvrebert @eintnohick
Merge branch '3.0.0-wip' of github.com:twitter/bootstrap into 3.0.0-wip
Merge branch '3.0.0-responsive-tables' of https://github.com/juthilo/bootstrap-wip into juthilo-3.0.0-responsive-tables

Conflicts:
	less/mixins.less
comma for the guardian angel /cc @cvrebert