[DRAFT] TrickPlay: Frontpage editor

# This is a draft; don't merge until ready

![screen shot 2013-08-23 at 11 35 09 am](https://f.cloud.github.com/assets/777999/1017129/9ec1dbb0-0c09-11e3-9825-303717e60191.png)

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**Things left to do**
- [ ] Write AJAX endpoints
- [ ] Write frontend logic