Feature/jena2.11

Arvid, this patch updates the Jena stack to 2.11. I tested a few things, but not everything. I tested:

- opentox.listModels(ontoServer)
- Open PHACTS API call
- creation of a local in memory model
- loading from a file
- SPARQL-ing on a local model

I did not test:

- TDB disk storage
- direct remote SPARQL
- reasoning with Pellet

All in all, I think it should be merged.