Preparing material for next major release of lesson materials.

*   Inline legacy lesson material (under `lessons/swc-*`), setup instructions, and material for generic bootcamp home page to make it easier for newcomers to figure out where things are.
*   Invert top-level directories: instead of `python/novice`, `git/novice`, etc., take @wking's suggestion and have top-level `novice` and `intermediate` directories with subject-specific sub-directories.
*   Creating single-page HTML version of notes.
*   Including names of everyone who's taught or contributed.
*   Including a template for bootcamp Etherpads.
*   Updating `README.md` to match new layout and build instructions.