Disable create method in NoteViewSet

Currently, a new note is created and attached to a newly created timeslot.

Trying to create a note should return a MethodNotAllowed exception.

added To Do label

added P3 label

changed milestone to %1.0-alpha5 — Capable Capybara

assigned to @eigenwijsje

changed the description

added Cycle [4/24] label

added Doing label and removed To Do label

closed

removed Doing label