fix plone.app.collection support in plone.app.event, pt.1 without expanding events
Fix case, where the events, which started before a queried timerange and
  lasts into the timerange were not included in the list of event occurrences.
apply sort_limit if events are not expanded to its occurrences
dont include the event_listing_settings view in the object actions for event_listings on Collections or Topics
Fix event_listing view on Collections to expand events. Fixes #91, Fixes #90.