Simplify Non-Slide Materials, Unify Content

This replaces the Outlines and Cheat sheets, which risk content duplication, with a single page per course with all materials.

Ultimately, the Workbook page will have a toggle to show level of content detail: teaching outline, script-walkthrough, or quick reference.

![screen shot 2014-02-04 at 2 56 04 pm](https://f.cloud.github.com/assets/352082/2081786/2e0a787c-8de7-11e3-8da7-c55be0abb0f6.png)