First commit of the project.

Whith those 3 files, we can run
a simple application in google appengine
that will output a page with a
video to be played. For now, the
video is hardcoded.

 - app.yaml : appengine configuration file
 - index.html : template page
 - main.py : main python code which generates the
     data for the template page.
Changing the video is now implemented

Added the functionality for the user to send a new file
to be played via form. At this point, only videos
already on S3 can be played. However, code in main.py has
a bit of repetition that can be streamlined.
Code cleaning in main.py

Streamlining and code cleaning in functions get and post.
Video conversion partially added

Functionality for video conversion added to main.py.

TODO:
  - For the moment, we assume that the job submission will work.
     This has to change.
  - We also assume that the file will be immediately available
     in the S3 storage, which is not true.