Renamed `HTTPStatusException` to `HttpStatusException`
Updates to the base controller, in order to get it ready for the Year & Years controller.

#kentprojects-66 work development 30m
Updates to the base controller, in order to get it ready for the Year & Years controller.

#kentprojects-66 work development 5m
A few new controllers, as well as some updates to the models.

#kentprojects-66 work development 10m
#kentprojects-66 work testing 10m
Some updates to the database importer and the provisioning file.