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
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.
Added Firefox support for CSS3 carousel transition
Expose transition durations on plugin constructors; closes #13656
CSS3 Carousel code formatting
add docs note about browsers w/ JS disabled; fixes #14134

[skip sauce]
Another new js bin link

/cc @cvrebert @hnrch02
Merge pull request #14143 from twbs/fix-14134

add docs note about browsers with JS disabled
Fix jsbin link
Merge pull request #14151 from BBosman/fix-link

Fix jsbin link
popover dismiss-on-next-click example: instead of <button>, use <a> w/ tabindex

Fixes #14038.

Research supporting this choice of approach:
    https://gist.github.com/cvrebert/68659d0333a578d75372

Why not <button>?
Even with a `tabindex` attribute, they don't gain focus when clicked upon in:
    * Mac OS X Firefox 30.0
    * Mac OS X Safari 7.0.5
regenerate docs/assets/js/docs.min.js
Follow-up to #13907: simplify JS logic for focus shim
Clean up Affix documentation
Clean up the Alert documentation
Merge alert examples and add `.bs-example-standalone` class
Merge pull request #14160 from hnrch02/simplify-button-focus-logic

Follow-up to #13907: simplify JS logic for focus shim