Updating the settings files to pick up the new applications
Forgot a step.
First pass at XBlock for composition

* Implement a basic XBlock for composing. Allows the user to enter text
  and see what they entered.
* Dirty shell script to install the XBlock demos into this working tree
  so that we can use the workbench for early prototyping. This should
  not be used any more once we integrate into LMS, obviously.