CLC-3921 Cover the calendar exporter with tests
CLC-3921 More test coverage and exception handling for exporter
CLC-3921 Fix failing test
CLC-3921 Add todos
CLC-3921 queued entry now knows if it corresponds to an event already saved in google
CLC-3921 Support updates of events
CLC-3921 Don't overwrite attendees accepting or declining events
CLC-3921 Add TODO about supporting event deletion
CLC-3921 Changes per code review; make Travis happy
Merge pull request #2698 from ctweney/clc-3921-updates

CLC-3921 Support updates of events