Add creation/update ops for events

Ended up having to clean up how booker POST were handled previously it was just for auth().

Had to do extra filtering of TermTime.events result from API as TermTime (2021T at least) was returning some events with room 'None'.

Also, kept/added 'Room' and 'code' to 'create' and 'update' comparisons so that meaningful logging could be done.

Separated requests debug logging to help testing.

Closes #19 (closed)