Video player improvements #96

(See https://github.com/popcorn-team/popcorn-app/pull/96)

Upgrade of video-js 4.3.0 --> 4.4.3
Upgrade stylesheet of video-js to make subtitles list look better
Sort subtitles by language name instead of key
Integrate progress tips plugin for video-js
Add a settings menu to set subtitles color, size and position. This is still a Work In Progress. Settings are not saved, and you must re-set them every time you load different subtitles.

Let me know what you think !
![subs01](https://f.cloud.github.com/assets/6877248/2494549/eab5653c-b2cb-11e3-80f2-b765703fd9fc.jpg)
![subs02](https://f.cloud.github.com/assets/6877248/2494550/eab79cc6-b2cb-11e3-9ccc-3d876b342f4a.jpg)