Added mobile middlewares
Merge branch 'master' of github.com:opps/opps

* 'master' of github.com:opps/opps:
  changing datetime.now to timezone.now
  PEP8
  Add custom_fields methor on container to help populate on template all the json custom fields
  Add unicode treatment on JSONField rendering
  Fix test get_container_by_channel, write recursive test
  Fix pep8 on template tag, get container by channel
  Add redis drive on requirements
  Add services redis server on travis
  write test on notifications
  Add opps contrib notifications tests
  set dynamic db int, on db drive
  fix: get_child recursivelly