Allow setting default groups for new users
Enhance and test the annotation-creation views
Add a new group specifically for making annotations
Tweak builddb script to load default group data from fixtures
Additional tests and cleanups
Merge branch 'master' into acl_graph

Conflicts:
	ehri-extension/src/main/java/eu/ehri/extension/AdminResource.java
	ehri-extension/src/main/java/eu/ehri/extension/AnnotationResource.java
	ehri-frames/src/main/java/eu/ehri/project/acl/AclManager.java