use @popover-arrow-width for offset the popover 

* The problem with #12674 is that it reassigns the same variable, but the color values were purposely different.
* This uses Less's color functions to generate the proper darker colors.
* Why darker colors? Because those CSS carets render lighter than their solid border counterparts. Consider it a design hack.

Update teams

chrome => googlechrome in Sauce

Fixes #12657

Update docs prefixing

Reorder links

Fixes #12625: Only remove first list group item's top and last list group item's bottom borders when the list group is first or last

Fix first element padding of list-inline

Conflicts:
	dist/css/bootstrap.css.map
	dist/css/bootstrap.min.css
	docs/dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.min.css

Fixes two typos in carousel.less

Conflicts:
	dist/css/bootstrap.css.map
	dist/css/bootstrap.min.css
	docs/dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.min.css

Update holder.js to v2.3.1.

Omit semicolons consistently in docs

Conflicts:
	dist/css/bootstrap.css.map
	dist/css/bootstrap.min.css
	docs/dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.min.css

Fix #12656: add @blockquote-font-size

Exclude jade files from docs