Added xpf:floor to both xpf and xqf namespaces
Fixed issue with DAV QoS re-write rule for text/html
Fixed issue  with owner of the resource created with WebID auth
Fixed lexer for TRIG
Updated Jena providers

* Removed unnsessary commits in VirtBuldUpdateHandler
* Removed unnessesary check that graph exists after remove
* Replaced  n.getLiteralValue().toString() with n.getLiteralLexicalForm()
* Updated  VirtGraph.delete(Iterator<Triple> it, List<Triple> list)
  was updated to use more faster "SPARQL DELETE  FROM {   }" call