Add nested kbd element styles for actual keys or inputs
Fixes #13478, reverts #10941
Revert "Temporarily revert README deletions from #13470,"

This reverts commit 54284a13c6b503d925bf6f75db2830f1af7fcf98.
Merge branch 'master' into icon_paths

Conflicts:
	dist/css/bootstrap-rtl.css
	dist/css/bootstrap.css.map
	dist/js/bootstrap.min.js
	docs/dist/css/bootstrap.css.map
	docs/dist/js/bootstrap.min.js
Merge branch 'master' into icon_paths

Conflicts:
	dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.css.map
Customizer: Alert on successful save to Gist
Update showSuccess to use new classes
Hopefully a fix for #12364

* register the callback before invoking the toggling
* listen for `hidden` instead of `hide`
* account for the possibility of the associated `show` event being preventDefault-ed

Adds relevant unit tests.
Merge branch 'master' into icon_paths
Applied translate3d to modal, navbar-fixed and affix to combat browser repaint
Merge branch 'master' into icon_paths

Conflicts:
	dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.css.map
Table-responsive: changed overflow-x to auto to hide scrollbar when it's not overflown, fixes #13669.
text transformation added

Transform text in components with text capitalization classes.
Color Contrast for panel heading

related to #13686
fix variables in panels.less
removing unnecessary max-width on tables
Changed broken #authors anchor to #creators
Merge pull request #13716 from rustinlee/fix-creators-anchor

Changed broken #authors anchor to #creators
bump grunt-contrib-qunit to ~0.5.1
bump grunt-contrib-jade to ~0.12.0