Testing Version with Chromecast Subtitles

This a pre-release version for testing the new additions.

New additions:

• Subtitles for Chromecast (support .srt and .vtt just drag and drop them after the movie).
• Rewind/Forward 30 seconds buttons.
• Automatic Updating Mechanism
• New UI thanks to @gregsqueeb for proposing it 👍

Enjoy the early access release.