Added the acquireLock on the request object. TODO: Test it!

On request, added
- the callP method
- the validateTokenP method
- the validateTokenWithLockP
In q-enhanced module added:
- demxmifyObjMethod
- demxmify
In simplifiedRequest added:
- (get|put|post)P
Added the prototype for the macro.artist.get.
Removed helenus module (required for cassandra) and ytdl (for testing youtube download_

Removed scanned directory from the project (seems to speedup project load)
Added a prototype for the artist.images.get macro.