Added Skos importer based on Sax parsing code by Linda, but not working yet
SkosCoreCvocImporter is working but not finished
More changes for concepts
Added creation of concept relations
Added a skos-import command for the commandline tool
Added REST interface for deleting all concepts of a specific vocabulary
Changed the dhtml for rendering vocabularies
Merge branch 'master' of https://github.com/PaulBoon/neo4j-ehri-plugin

Conflicts:
	ehri-extension/src/main/java/eu/ehri/extension/VocabularyResource.java
	ehri-frames/src/test/java/eu/ehri/project/test/CvocTest.java
Upgrade Neo4j/Tinkerpop versions. This should be safe to do because
the Tinkerpop dependencies have been removed from Neo4j so they won't
clash. Also switch to logback instead of log4j (and add Maven
exclusions for log4j) because more projects are using it so there's
theoretically less likelyhood of a logger implementation clash.
Update Neo4j/Tinkerpop versions
Fix a stupid, recently introduced bug in the serializer that borked
serializing relations more then 1 level deep.
Add more tests to exercise bundle serialization and ensure that
serialization of deeply-nested relations is working.
Add logback config and remove log4j config