Merge with local changes (actually only two conflicts regarding logging), some fixes, because the tests did not run:

- The folder /tmp/omnom_files is now created automatically (or whatever folder is configured)
- The Jersey client is set to explicitly ask for RDF in the ClientITCase, by default it asks for JSON as well and then unfortunately gets JSON...
Merge branch 'master' of github.com:DM2E/dm2e-ws

Conflicts:
	src/main/java/eu/dm2e/ws/api/AbstractPersistentPojo.java