Updated .scale() mixin so that it accepts optional vertical scale factor parameter.
reverted changes in commit 96109d3 which seemed to break conditional classes in striped tables (ignoring the comment above that the previous rules were needed for just this purpose)

fixes issue twbs/bootstrap#11728
Remove incompatible properties.
Lint docs-assets/js/application.js and docs-assets/js/customizer.js.
Fixes #11756: Mention document mode checking ability in IE comaptibility modes
Fixes #11729: Show code snippets on mobile views
Shorter download text because narrow viewports
prevent horizontal scroll on components
improve icon display on narrow devices
Add new template, Dashboard
Add .container-fluid variation for full-width containers and layouts

/cc #10711 #9862
Fixed some errors in the docs javascript.html
Merge branch 'master' of https://github.com/twbs/bootstrap into correction
Add new template, Cover
Merge pull request #11772 from KostyaTretyak/correction

Fixed some errors in the docs javascript.html
image compression
Merge branch 'master' of github.com:twbs/bootstrap
Merge branch 'master' into pr/11750

Conflicts:
	dist/css/bootstrap.css
	dist/css/bootstrap.min.css
Merge pull request #11748 from bganicky/patch-1

Updated .scale() mixin so that it accepts optional vertical scale factor...
add vertical-align back to where it's necessary since we reset from block to inline-block on several inputs