Updates app

Hey Dylan,

Looks like I merged some thing that you didn't.  I suggest you merge develop into your branch, then look at this pull request again.

I took the "updates" branch and ran with it.  It's not perfect, but it should give you an idea of how to implement a subtitles front-end.  Just look in the video_download.html code (which should be cleaner) and videodownload.py (which should have a few additions for updating the updates table).

Let me know if you have any trouble!
Ben