remove all UI around templates, preserve functionality in config file

Removes the template UI:
![screen shot 2014-06-23 at 5 03 12 pm](https://cloud.githubusercontent.com/assets/108094/3363953/ce70469e-fb19-11e3-9ca3-01d48fdca786.png)

But you can still use templates by specifying an `interactivity_layer` and `template` in the project.yml.