Js.videojs

* gkatsev checked throwIfWhitespace first in hasElClass ([view](https://github.com/videojs/video.js/pull/3640))
* misteroneill pinned grunt-contrib-uglify to ~0.11 to pin uglify to ~2.6 ([view](https://github.com/videojs/video.js/pull/3634))
* gkatsev set playerId on new el created for movingMediaElementInDOM. Fixes 3283 ([view](https://github.com/videojs/video.js/pull/3648))

* imbcmdth Added exception handling to event dispatcher ([view](https://github.com/videojs/video.js/pull/3580))

* misteroneill fixed wrapping native and emulated MediaErrors ([view](https://github.com/videojs/video.js/pull/3562))
* snyderizer fixed switching between audio tracks. Fixes 3510 ([view](https://github.com/videojs/video.js/pull/3538))
* jbarabander added title attribute to audio button. Fixes 3528 ([view](https://github.com/videojs/video.js/pull/3565))
* misteroneill fixed IE8 media error test failure ([view](https://github.com/videojs/video.js/pull/3568))

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* vdeshpande fixed control text for fullscreen button ([view](https://github.com/videojs/video.js/pull/3485))
* mister-ben fixed android treating swipe as a tap ([view](https://github.com/videojs/video.js/pull/3514))
* mboles updated duration() method documentation ([view](https://github.com/videojs/video.js/pull/3515))
* mister-ben silenced chrome's play() request was interrupted by pause() error ([view](https://github.com/videojs/video.js/pull/3518))

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