Add leanModal vendor src to files.json for cms jasmine tests. Also .gitignore compiled js from coffee specs

awareness'

add a delete-all-versions flag to the delete_item method in the modulestores. Extend tests to verify. Still wip

studio - commented in the static HTML boilerplate for the course overview field - needs wiring to CodeMirror with a setVal() method

when updating the list of children of sequentials, we must use the 'direct' store otherwise we end up with draft revisions of sequentials, which is bad

This allows us to a) compile the coffeescript and sass from xmodules
using the new out-of-band method and b) reload xmodule static content
whenever it changes, which should make devs much happier.