Changes

|Add PhantomJS based tests to vtt.js' TravisCI automated test suite || || [reyre] ||

* Alex Kotliar

|Webmaker Technical Documentation || || [Pomax] ||

* Michael Veis

* Shajinth Pathmakulaseelan

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| RTL (Right To Left) localization work (Arabic, Hebrew) || || [ali, igor, gvn, cappleton] ||

* Barry Tulchinsky

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