Fix #11400 and #11431
Fixed single btn in btn-group-veritcal not being rounded
Reduce size of the visibility styles
Fixes #11669 - Adds smooth modal scrolling on iOS by default
Don't exclude fonts from bower installs

Excluding fonts/ from bower installs causes glyphicons to be
unavailable to projects using development Bootstrap LESS files.
Drop redundant module import
Add `.animation-*()` mixins
Remove unused variables.
hide space characters in input-group-btn to fix segmented buttons double border
Improve pager customization
Add new template, Cover
Issue #11852 : create a new variable for the list group active item link text.
Merge branch 'master' into pr/11302

Conflicts:
	dist/css/bootstrap.css
	dist/css/bootstrap.min.css
Merge branch 'master' into pr/11435

Conflicts:
	dist/css/bootstrap.css
	dist/css/bootstrap.min.css
Merge pull request #10704 from XhmikosR/various

rm unused vars
Merge pull request #11326 from ZDroid/animations

Add `.animation-*()` mixins
parallelize Travis using build matrix & test subsuites
document #11326
correct bookmark prefix
Merge pull request #11864 from twbs/parallelize-build

parallelize Travis using build matrix & test subsuites