Configure celeryd and celerybeat for lernanta
configure lernanta to use memcached
New vars for lernanta_domain, lernanta_admin_user and lernanta_admin_email. Disable debug mode for lernanta. Renamed vars_files, you now need to copy vars/credentials.yml to vars/credentials_local.yml and update the variables appropriately
Merge branch 'master' of github.com:p2pu/marvin