Remove EpicEditor.
Add django_ace.
Swap EpicEditor for django_ace.

EpicEditor was having issues adding extra newlines, and was difficult
to style. Given that the live preview wasn't an important feature to us,
Ace Editor seemed like a much more reasonable option, and is much easier
to work with via django_ace.
Merge pull request #97 from Osmose/switch-to-ace

Switch to Ace Editor instead of EpicEditor.