Add mirror channel field on container
create container migration, add channel mirror_channel
Merge branch 'master' of github.com:opps/opps into container-multichannel

* 'master' of github.com:opps/opps:
  Fix bug, if not exist post return error on sse action
  Write test notification, save copy notification
  remove save duplication on notifications
  Fix auto save notifications
  Generate migration, add 2 field on conrtib notification
  Fix database prefix connection on Notification AsyncServer
  add channel_long_slug and slug on Notification models
  Fix pep8, opps/contrib/notifications/views.py:103:5: E303 too many blank lines (2)
  Create get templates on contrib notification
  Fix exclude ids on generic list views
  Add get_absolute_url on notification model
  Fix get object is func
  Fix album and link search templates
  Add AlbumIndex and LinkIndex on articles search_indexes
  Change get_children to get_descendants on set channel rules
  Set field Container in Notification is required remove Notification migration 0002
  added celery task to create notification and changed model to accept null user and container
set mirror_channel (field) null/blank is True
create signals create mirror
register mirror admin fake to test
add field mirror_channel on articles admin
Regenerator migration, add field mirror
Hide mirror on admin, used class HideContainerAdmin
Add dum rdb on git ignored file
Check child_class, if mirror set context to container field
Add field old mirror_channel
Remove old mirror_channel field on Channeling models
create task check_mirror_channel, create or update mirror instance
Add django-celery on opps core
Fix test runner, set celery run in redis
Write rule for delete container (mirror) on remove channel mirror
Create task and method to be able to unit test
write test for run check_mirror_channel
Wirte test add/remove mirror_channel on Container