Fixed project structure for heroku.
Using mongolab.
Using Procfile with gunicorn.
Using mongolab addon.
Without gunicorn
Revert "Without gunicorn"

This reverts commit d0d779ffd67f6c6cdeffe0c776c6b47538cec655.
Different version for djangotoolbox and pymongo
Fixed requirements.
Specified python version.
Using mongolabs as separate service.