TODO

 - Rework toolbar, migrate to GtkHeaderBar
 - Update NewEvent widget to use GtkOverlay
 - Rework internal GcalWindow working
 - Clean GcalWindow compilation, no warnings

 - Add scroll_to_unit in day-view and week-view. Meaning, scroll to the actual
   hour.
 - Add disable/enable of views
 - Handle GObject bindings update to not work on hidden views
   e.g.: when removing a child is he view is hidden not update
 - Rework GcalViews as grid only (WeekView, MonthView, YearView)
 - Rework GcalViews to implement the new API (remove every "New API" comment)
 - Review views title string: "Year 2013", shouldn't say "Year"
 - Review gtk-styles.css file for actually working css definitions
 - Add css file and svg image to resources files
 - Reorder funcs inside GcalWindow
 - Fix nav-button css to matches pushed-down state (font-color goes white)
 - Review all-day checkbox and date/time fields interaction in GcalEditDialog
 - Check width of read-only layer in GcalEditDialog
 - Review the real need of GcalFloatingContainer
 - Review/check the adding of a new source live.
 - Review size/resize of GcalEventView widget
 - Review GcalWeekView implementation to follow Benjamin's advice of not composite
   with Gtk+ widgets other than GtkOverlay.
 - Rethink signals from GcalManager
 - Order events chronologically in views
 - Change ordering of events in all-day views (use a custom ordering)
 - Add different triggers for hiding the sources view.
 - Connect keyboard-shortcuts like Ctrl+Q
 - Check for the real need of adding timezone, and check everywhere
 - Connect all dconf options to the program
 - Clear/reorder #include in every header file.
 - Review every g_return_if_fail statement since G_OBJECT macros does that
   already
 - Check the real need of a caching GcalManager

Design stuff

 - What to do when there's no host set in the event.
 - Interactions explained
     - When to show/hide sources view
     - When to show/hide new-event overlay
     - Random stuff I don't remember now

Roadmap

 - Check MonthView is fully functional
 - Add new-event mark to week-view
 - Scroll week-view to the actual-hour

Wish-list

 - Add resize-by-handlers capabilities to GcalEventWidget
 - Add drag-to-move capabilities to events on views