MOCCACAL-8: Changing the viewer (Month, Week, Day) is not remembered

 * store currently selected view in a session cookie
 * need to update to FullCalendar 1.6.4 to have the "viewRender" callback
 * while upgrading also scrapped the google calender javascript code
   which is simply not used by now
MOCCACAL-20 - Show Event List of the latest events

 * first draft to have an extra tab with a list of events
 * needed to write custom "event renderer" for the full calendar
 * additionally the JSONServce now renders html for the events,
   due to lack of a better place
 * range selection (aka paging) is not implemented, and sorting
   behaves strangely