added eventable CallBundle
CallBundle/EventBundle fixed views
validation for EventBundle
ListBundle implemented argument based filter for datagrid
added navigation for calls, tasks, meetings
created index for calls, tasks, meetings
CallBundle - fixed listing
activated RelationshipBundle
various fixes
declaring Task as activity - for ActivityBundle
fixing migrations
fixing migrations - call
fixing migrations - list
fixing ContactInfoBundle migration bad path
fixing EventBundle migration - call reference was missing