Added get_name convenience method for Calendar (#212)
Added get_name convenience method for Calendar (#212)

* Added get_display_name convenience method to Calendar object which gets and returns the calendar server's display name.

* Calendar get_display_name method calls get_property method to return calendar display name

* Replaced existing calls to get_property(dav.DisplayName()) with new get_display_name method
python-caldav/caldav