Add Embed responsive utility
Merge branch 'responsive-embed' of https://github.com/boulox/bootstrap into boulox-responsive-embed

Conflicts:
	dist/css/bootstrap.css.map
	dist/css/bootstrap.min.css
refactored and renamed grid mixins
Added .list-group-item.disabled

Added support for disabled List group item.
Update variables.less
grunt with new mixins
grunt
Update teams to remove two Sass folks and add new Core member
i'm an idiot
Make both .scale(X) and .scale(X, Y) both work
use @popover-arrow-width for offset the popover to account for the popover arrow
add copyright header to shrinkwrap.js; fixes #12643
tweak phrasing for hopefully greater clarity
add .sr-only-focusable; fixes #12259
update docs to include+use .sr-only-focusable
fix indentation in Gruntfile
Use different coding style for Gruntfile

Fixes #12657
chrome => googlechrome in Sauce; fixes #12647
Merge pull request #12680 from twbs/googlechrome

chrome => googlechrome in Sauce
Merge pull request #12665 from twbs/docs_teams

Update teams