Hoffi1:feature/page heading (3)

More changes regarding issue #566 - page title / heading
- altered frontend views attendees, calendar, categories, category, day, eventslist, myattendances, myevents, myvenues, search, venue, venues, weekcal
- removed feed from search, categories, venues
- tried to make all calendar views tmpl files as identical as possible
- implemented JEMCategories::getParentlist() (used in frontend category view to build pathway)

Not ready yet: editevent, editvenue, event.