add "focus" to focused btns with button plugin
Add touch-action: manipulate to buttons
use non-minified Bootstrap CSS on non-gh-pages
use non-minified BS Theme CSS on non-gh-pages
use non-minified docs CSS on non-gh-pages
use non-minified docs JS on non-gh-pages
use non-minified Bootstrap JS when on non-gh-pages
Fixes #13746: Add docs section for brand image
Address margins on .navbar-right to fix #13325 #13464.

This commit follows f9fde56.
Merge pull request #14029 from BBosman/touch-action

Add touch-action: manipulate to .btn
Merge branch 'master' of github.com:twbs/bootstrap
grammar fix; indicate that img[src] shouldn't actually be empty
nitpick phrasing of the docs added for #13835
Fix small typo introduced in e2029e1
Merge pull request #14057 from hnrch02/patch-1

Fix small typo introduced in e2029e1
docs HTML5 validity fixup to 8e2348e9eda51296eb680192379ab37f10355ca3
Merge pull request #13907 from twbs/fat-12145

add "focus" to focused btns with button plugin
Merge pull request #14051 from loic/issue13325

Address margins on .navbar-right to fix #13325 #13464.
Follow up to #13907: Add .focus styles for buttons
Merge pull request #14058 from twbs/btn_focus

Follow up to #13907: Add .focus styles for buttons