Adding the documentation how applying tasks to a named queue
Added configuration for celery beat
Merge remote-tracking branch 'github/master' into dev/dj-scheduled-task

* github/master:
  Import cStringIO for better performance when possible
  Raise a more specific error when tiles / thumbs not found
  Add restful URL endpoints to for 'tile' and 'thumb'
  Remove pointless code
  Clean some style
  Update the MultipleDatabaseModelDocument with a more stable implementation
  Update admin interface to use APIv2 attachment uploads and downloads
  Remove jqueryupload module / blueprint
  Add new attachment upload / delete button to session list
  Finalize APIv2 for attachments
Moving celery configuration to flask configuration
Fix for application context required
Documentation for running autosync tasks
Merge branch 'dev/dj-scheduled-task'

* dev/dj-scheduled-task:
  Documentation for running autosync tasks
  Fix for application context required
  Moving celery configuration to flask configuration
  Added configuration for celery beat
  Adding the documentation how applying tasks to a named queue
Merge branch 'master' of github.com:SlideAtlas/SlideAtlas-Server
Fix documentation generation after refactor
Merge branch 'fix/doc-after-refactor'

* fix/doc-after-refactor:
  Fix documentation generation after refactor