* master:
  Replace some images on the Carousel example with some base64 encoded 1x1 gifs
  ugh grunt
  moar grunt
  mo copy
  http://www.youtube.com/watch?v=AJWtLf4-WWs
  grunt
  Copy change
  fix grammar in comment in forms.less
  Fixes #12759
  Fixes #12738
  replace .visible-{size} with .visible-{size}-{display} ; fixes #8869

Conflicts:
	dist/css/bootstrap-theme.css.map
	dist/css/bootstrap.css.map
	docs/assets/js/customize.min.js
	docs/assets/js/raw-files.min.js
	docs/dist/css/bootstrap-theme.css.map
	docs/dist/css/bootstrap.css.map
	less/mixins.less

Move all deprecated vendor prefix mixins to less/mixins/vendor-prefixes.less
Create mixins directory and move partials to that directory.

FIXES #12994

replace .visible-{size} with .visible-{size}-{display}

Ensures proper sizing and alignment of input groups within inline and
navbar forms.

* Uses `inline-table` on the input group
* Nukes the widths to `width: auto`—without this, the parent input
group doesn’t size correctly and functions as `display: table;` or
`block`

* Removes default max-height from .navbar-collapse (so not every navbar
will get a max-height collapse section)
* Scopes regular 340px max-height to fixed top and bottom navbars only
(those are the only ones that really need a max-height to enable
scrolling)
* Adds a landscape media query for phones to cap the max-height at
200px for fixed navbars"

Fixes #12843: Scope label styles for horizontal forms to a media query so their narrow viewport display looks just like a normal form

Fixes #12669: Properly reset line-height on date inputs for all sizes; Fix IE8+'s misaslignment of text within date inputs

Mixin table of contents

* master:
  Fix bad grunt merge and then G R U N T
  Reorder the Gruntfile a bit
  Fixes #12892: Link to one of the SO articles on Bootstrap modals and YouTube
  Remove unneeded quotes.
  Rename generateRawFilesJs to generateRawFiles
  Remove redundant parens

Conflicts:
	docs/assets/js/raw-files.min.js
	test-infra/npm-shrinkwrap.canonical.json

FIXES #12992

Rename generateRawFilesJs to generateRawFiles

Remove redundant parens

Conflicts:
	Gruntfile.js

Remove unneeded quotes.

Don't ignore every dot file in Bower

add .sr-only-focusable