The compare_for_single_day() method is reproducing the
same functionality from gcal_event_compare(), and the only
consumer is the Year View. So, for now, simplify the
comparing function and put it in year view file.
Also, this commit vastly improves and documents the year
view's algorithm to add events to the sidebar list.
This compare function is made to sort using the same two methods used
before but together, giving priority to the longer events.
The idea is sort event properly on year-view's sidebar.
This function will probably change later.
Added GcalEventWidget::is_multiday to check if an event span more than
one day.
Added GcalEventWidget::compare_by_length which compares two event
widgets according to the duration of the events they represent.
The changes made here are minimal to get this building. GcalEventWidget
needs a new rethink and rework to accommodate to those new internal
attributes, which replaces some of the old ones.
Refactoring the code inside GcalMonthView for drawing and for showing child
widgets.
Fixed ref_sink in GcalEditableRemainder. (Don't need it)
Added translation for weekdays abbreviation. (Thxs to ebassi & mclasen)
Passed make distcheck.
Added GcalEventWidget::activated signal.
Fixed bug in GcalMonthView preventing to get button events.
Added methods in GcalUtils from Evo for formatting time.
..and stuff
