CalendarView version 1.4

Version 1.4 of the CalendarView is now available.
- New:
- Search function
- FocusOn function to go to the date of the passed Event.
- FilterEvents property. If True, the CalendarEventFilter is fired for each event before displaying it.
- CalendarEventFilter event. Return True if the event should be displayed.
- DayGradient property
- When creating a new CalendarEvent, a "Cancel" button appears to cancel the creation of the CalendarEvent.
- Fix:
- Events not displaying in Week view.
- Events appearing twice in Week view.
- Improved drawing performance.
- Pressing a key used to scroll down. Now only the down arrow scrolls down.

