Move sleep-specific things into the sleep app

Also removes static files from version control, and adds the
static directory to the .gitignore. Finally, slightly renames
the stats view.
Removes an extraneous print
Renames license.txt to LICENSE.txt
Creates an initial sleep entry grid with mouse tracking

In addition, adds the renderContent option to our inclusion tags
so that we can get around the problem of not being able to add
CSS into the <head> section from an inclusion tag.

Also includes some temporary reorganization of the mysleep page.
Adds displaying existing sleeps to sleep-entry
Merge branch 'master' of github.com:benjaminjkraft/zscore
Finishes linking the sleep entry UI with the backend

This completes the barebones sleep entry. It still needs major
UI polishing and cleanup, but the entry portion is at least
functional.