TODO

 - Review size/resize of GcalEventView widget
 - Rethink signals from GcalManager
 - Order events for starting hour in GcalMonthView, and the others
 - Review static modifiers
 - Connect keyboard-shortcuts like Ctrl+Q
 - Check for the real need of adding timezone, and check everywhere
 - Create GcalView interface or superclass of all views.
 - Connect all dconf options to the program
 - Remove body_actor if there's no need of it in the end.
 - Clear/reorder #include in every header file.

Design stuff

 - What to do when there's no host set in the event.
 - What to do when we found an event out of our day view
   (out of 8:00 - 17:00)