Fixed the progress bar colors in firefox and added color variables
Bug introduced by f8f341bb82d7e2db581d29e47212a573dfa05fff
Fixed the Closed Caption button not showing on the first video.
Bug introduced by c7f47a2afdaa877fa6fbce5b660f7860685a3bbf
Fixed a javascript error with the multimedia and the multipli loading of the controls
WET theme: Enabled secondary menu to work without the a element on the top header
Fixed the multimedia controls not loading.
Details/summary: Added indenting and margin bottom when details is open (fixes #5197)
Updated the GitHub token (post HeartBleed)
Addes multilingual menus
This fixes the menus not working for any languages but english and french in themes
Front page improvements

* Abbreviate 'What is the Web Experience Toolkit?'
* Re-order and abbreviate 'Key resources'
* Add links under 'Benefits'
Reproduce changes in French file
Add "docs" task to quickly rebuild docs pages, when making changes to documentation locally
Improve documentation page

* Move instructions on how to improve the docs to the bottom of the page.
* Promote using and customizing WET to be the top options.
* Use more direct language and links in first paragraph.
* Remove repetition of "Getting started".
Correct typos on bugs page
Correct typo on pull request page
Highlight the current stable version on the downloads page
Add versions task to Gruntfile
Getting started improvements

* Move using and customizing WET to top
* Remove "Step 0" of creating a GitHub account, which is not needed in two out of four activities
* Improve clarity of instructions
Close unclosed strong tag
Link to YouTube multimedia example
Link to carousel example