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.
allow require.resolve('bootstrap') to work under node
added 'main' field to package.json
Ensure that hidden event is sent when content is really hidden (collapsing class is removed)
Added Firefox support for CSS3 carousel transition
Expose transition durations on plugin constructors; closes #13656
CSS3 Carousel code formatting
properly integrate Rouge into the Travis build; fixes #14078

[skip sauce]
Merge pull request #14083 from twbs/fix-14078

Properly integrate Rouge into the Travis build
add role="presentation" to tab <li>s to improve accessibility

Refs #13554.
Per https://github.com/paypal/bootstrap-accessibility-plugin/blob/master/README.md#tab-panel
Credit: https://github.com/paypal/bootstrap-accessibility-plugin

[skip sauce]
Add role="tabpanel" to .tab-pane <div>s to improve accessibility

Refs #13554.
Per https://github.com/paypal/bootstrap-accessibility-plugin/blob/master/README.md#tab-panel
Credit: https://github.com/paypal/bootstrap-accessibility-plugin

[skip sauce]
Merge pull request #14086 from twbs/tab-pane-role-tabpanel

Add role="tabpanel" to .tab-pane <div>s to improve accessibility
Merge pull request #14085 from twbs/tab-lis-role-preso

add role="presentation" to tab <li>s to improve accessibility
add role="tabpanel" to .panel-collapse to improve accessibility

Refs #13555.
Per https://github.com/paypal/bootstrap-accessibility-plugin/blob/master/README.md#collapse
Credit: https://github.com/paypal/bootstrap-accessibility-plugin

[skip sauce]
Add role="tablist" & aria-multiselectable="true" to accordion .panel-group to improve accessibility

Refs #13555.
Per https://github.com/paypal/bootstrap-accessibility-plugin/blob/master/README.md#collapse
Credit: https://github.com/paypal/bootstrap-accessibility-plugin

[skip sauce]
Merge pull request #14088 from twbs/panel-collapse-role-tabpanel

add role="tabpanel" to .panel-collapse to improve accessibility