added view

added view
Added list to view

updated view
optimized view layout
merge with master
modified view
Added approved status to events model
added more details to overview of events from one day
added functionality to change the date
added dependencies between event and user
added test data
layout optimization, more infos to events and bookings are displayed
Revert "added test data"

This reverts commit 9c94bfd49b82fb688ef5b00043f1bf852190e22c.
Revert "added dependencies between event and user"

This reverts commit 97634248915924716811dffa2ca2b734bd96b6cc.
updated attribut checks in controller
Merge branch 'dev' into feature#49