Add a command line task for adding a user.
Javadoc fix
Javadoc and unnecessary cast cleanups (via Intellij)
Merge branch 'master' into filtering_ordering

Conflicts:
	ehri-extension/src/main/java/eu/ehri/extension/AbstractAccessibleEntityResource.java
	ehri-frames/src/main/java/eu/ehri/project/views/impl/Query.java