WebKit CSS3 carousel transforms for supported devices
Utilised mixins rather than specific WebKit properties
Removed unnecessary percentage sign for 3D translation
Improved mixin ability with nested media query
Changed last-child to first-child
As noted by @jerem the first child will actually be the last shown
replace js scrollspy test for default behavior
Revert "Temporarily revert README deletions from #13470,"

This reverts commit 54284a13c6b503d925bf6f75db2830f1af7fcf98.
Add aria-haspopup and aria-expanded attributes to dropdown plugin

1. Add aria-haspopup="true" and aria-expanded="false" to dropdown docs
2. Toggle aria-expanded between "true" and "false" when opening and closing dropdown

Satisfy item 1 from https://github.com/paypal/bootstrap-accessibility-plugin#dropdown. See #13553.
fix #13386
Remove broken link to Customizing Bootstrap
fix typo in css - buttons
Merge pull request #13901 from knownasilya/typo

Fix typo in css - buttons docs
Use @font-size-small variable to calculate <small> font-size fixes #13713 #13809
Fixes #13903: Restore side padding on .btn-block
Merge branch 'master' of github.com:twbs/bootstrap
grid class inconsistency /cc @juthilo
Merge pull request #13900 from twbs/customize_on_your_own

Remove broken link
Revert UMD (#13772 & friends) for now, due to #13812.

Will hopefully revert this reversion and land a fully-working version of UMD in v3.3.0.

Revert "some changes from #13801 - add strict mode back and =="
This reverts commit 2b302f69eea416bc85e7827b7d7a74d49f879662.

Revert "Fix regression of #10038 introduced by #13772"
This reverts commit e9d6756a1ac76a9db31a41e8e03f663bedc41b70.

Revert "MD/CommonJS/Globals #12909"
This reverts commit 1c6fa9010daf0d0c21de9e20fe6ac4dba1788d90.

Revert "address #13811"
This reverts commit f347d7d955bbb17234b8e12c68efae7d516ce62c.

Conflicts:
    js/carousel.js
    js/collapse.js
    js/dropdown.js
    js/modal.js
    js/tab.js
    js/tooltip.js
Merge pull request #13882 from thomaswelton/issue-13713-use-variable-small

Use @font-size-small variable to calculate <small> font-size
Update cover.css

Moved the inset box-shadow to .site-wrapper in order to keep the shadow at the edges even if content exceeds viewport and needs scrolling.