Added (incomplete) support for The Escapist

This adds incomplete support for video podcasts from The Escapist.
The Podcast is added, with cover art and all, but the episodes still don't show up to test
if it's possible to download.
Make sure the JSON is written in canonical form

This uses the `sort_keys` functionality of python's JSON module
to make sure the settings file doesn't change when the settings don't change.
Completed The Escapist support

This completes escapist support by fixing a typo in the model and
fixing a wrong regex.
Merge pull request #123 from somini/master

Adds support for The Escapist Video podcasts