Bumping development to version 1.3.4
Merge remote branch 'origin/release' into develop

Conflicts:
	api/ui/widget/operator_assignment.class.php
Adding new "collection" feature

- collections are arbitrary groups of participant
- can be locked so that editing is restricted to a list of specified users only
Merge remote branch 'origin/release' into develop

Conflicts:
	api/ui/widget/operator_assignment.class.php
Removing unneeded variables
Merge remote branch 'origin/qa' into release
Merge remote branch 'origin/release' into lightweight_queue