typo
Added basic event model.
Add show for event model.
Basically anything that wants to show events for itself should have
an events method in its controller which sets up the @eventable and
then renders the events/index view.
Record automatic event on scheduling FITS.

Now I may rework this a bit to make it easier to use a
standard vocabulary for events.
Instead of directly storing a message we store a key, which the
individual Eventable can then interprets as it pleases.
Changes around the above.
Add Eventable module to abstract some things that event holding
objects will want to do.
Add facility to add events to a file group manually.
Define events (and messages) in a yml config file. I think this will
make things a lot simpler.
Added more events to list.
Fixed test for different event wording.