removed a console.log in SearchService.js
fix single agenda search (ref: #471)
recurring_event_occurrence_for performance improvement (ref: #472)
Merge branch 'devel-1.6.4'

Conflicts:
	src/protected/db-updates.php
Merge branch 'master' into devel-workflow

Conflicts:
	src/protected/db-updates.php
feedback of request event occurrence