users (i.e., LV-EM MOU partners). Group names in the settings file,
as well as an external access tagname are used to control access.

Removed hack to emobservation json format for backwards compatibility with skymapViewer. The latter has been updated to use the new format.

- auth middleware to add/remove user to/from control room group based on IP.
- new model for operator signoffs (event, instrument unique_together)
- form to create, edit, and delete the operator signoff object
- eventlog messages for changes to signoff objects.
- OperatorSignoff serializer and LVAlert message
- alert operator of outstanding events on landing page.
- new labels and migration
- Added logic to create/remove H1OK, H1NO, etc. labels.
- Exposing the OperatorSignoff List resource through REST interface (GET only).