Remove `text-rendering`
fix nav divider
active item on list group should use @component-active-bg
-background to -bg on labels vars
-background to -bg on tooltip and popover vars
-background to -bg on jumbotron vars
-background to -bg on pagination vars
use @pagination- vars on pager component; change @pagination-bg-active to @pagination-active-bg
@state-*-background to @state-*-bg vars
better grid var comments
-background to -bg on wells vars
@link-color-hover to @link-hover-color
-background to -bg for body and table vars
more consistent btn vars
more consistent forms vars; drop search border radius since no more search form
more consisten dropdown vars
remove unused responsive navbar vars
more consistent navbar vars
Merge branch 'SBoudrias-patch-1' into 3.0.0-wip

Conflicts:
	less/type.less
remove text-rendering optimizeLegibility from headings