Use local database as primary source of events

[inghamn]

The system was original written using a Google Calendar as the primary storage of events. It used to be that users would add events first to the Google Calendar, then import them into inRoads.

This is starting to be a bit of a hassle now that we're starting to write automated testing. Also, our users now come to the inRoads web interface to add events, instead of adding them manually to the Google Calendar.

We should modify the system so that the local mysql database of events is the primary storage. Publishing the events to a Google Calendar should be optional.

[inghamn]

This is the root cause of #188