If a tag's name has some "uncommon" characters in it, like
parentheses (or probably others), it will cause errors for the
javascript which renders the event pages, since it tries to use
the tag name in the element id for the delete button.  We now require
that tags only use 0-9a-zA-Z_\- in their names. May have to go through
and delete some tags which use them.

generalizing and abstracting several models in the events app, as well as fixing many field parameters

Need to make sure values are actually numeric types before
just passing them to isnan(), since it can't handle them, apparently.

gstlal wants to set eff_distance to nan when they don't have a
meaningful value for it.  Unfortunately, we can't save that in the
database because MySQL numeric types can't deal with nans. So we
check for nans in this field and set it to NULL if it is nan,
before saving it in the database.

Updated event static file serving to use X-Sendfile with Apache.
This is faster, more efficient, and seems to resolve the issue
with FITS file downloads from the web browser:
https://bugs.ligo.org/redmine/issues/6194

Added requirement that event.search is not None before checking
that event.search.name is MDC.  Fixes a bug which occurred when a user
tried to get an event by specifying 'M1234' when the event was not
an MDC event (and didn't have a search associated with it).

adding optional override to Event delete() method which removes data directory and all associated GroupObjectPermission objects

adding offline boolean parameter to Event model class and associated code for handling it during event submissions

Localize EMFootprint start times to UTC.
Changed event creation time query to assume UTC.

and added these to the event presentation. Also added frequency
and fluence to the VOEvent for LIB events.

- 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).

Added trigger_id to translator code and serialization.
Added trigger_id to GRB event display.

Also added view logic and template for additional fields.

- Using new Model _meta API to get field names.
- Added auth migrations from Django.

as well as code to ingest the SimInspiral table and
a new template for injection-specific attributes.

authorized users can update the T90 through the
web interface. Also added trigger_duration and
translator to populate it for Swift and Fermi
events.

Fixed trigger_duration/T90 issue.

Added comment to view logic and form.
Added the comment to the EMO display.
Moved the EMO display into the log
digests section.

EMBB. Also changed presentation to reflect this.

the REST API in a manner analogous to that of the EventLog objects.
Also updated the VOEvent such that IVORNs include an incrementing
serial number and the Citations section contains appropriate
references to earlier VOEvents.