checkin generated js so we can depend on this sans publishing

Because this package uses an 'npm prepublish' step, we can't just use a git url to it as-is in our package/npm-shrinkwrap files.

This is a known issue with npm:
https://github.com/npm/npm/issues/3055

With these changes, if we make changes to the coffeescript files in the repository, we'll need to regen them and check them in.