Tomtoolkit

- Renamed ``ObservingTemplate`` to ``ObservationStrategy``. This includes updates to the names of various forms, URLconfs, templates, etc. Anyone upgrading to this version will need to modify any custom templates or views.
- Creates a ``DynamicCadence`` model to track cadences within a TOM.
- Adds the ability to create arbitrary ``ObservationGroup`` objects through the UI.
- Updated LCO observation modes to support v3 of the observation portal API.

- Updated LCO observation modes to support v3 of the observation portal API.

This alpha release does the following:

- Renames `ObservingTemplate` to `ObservationStrategy`. This includes updates to the names of various forms, URLconfs, templates, etc. Anyone upgrading to this version will need to modify any custom templates or views.
- Creates a `DynamicCadence` model to track cadences within a TOM.
- Adds the ability to create arbitrary `ObservationGroup` objects.

This release fixes the following issues:

- Observing templates function properly with new observation form format.
- Cadence fields appear properly.

This release updates the `GenericAlert` in the broker interface to return extras and aliases in the `to_target()` method. It also adds a management command, `setdefaultextras.py`, that will ensure all `Targets` have an entry for the specified `TargetExtra` with the value being the default value specified in `settings.py`.

This release updates the `GenericAlert` class to return a dict of `TargetExtra` data and a list of `TargetName` values, and updates the view to save those for any alerts saved as `Target`s.