add toRDF as FileReference function
in-progress work on getting podd client uploading file references and
testing it in an abstract test
initial API for testing deployment of file references and
starting/stopping the file repository
rename package
only generate a new free port if it was not configured before
startTestSSHServer is called
more work on file reference attachment test from client
move test host key to webapp/api/src/test/resources so it can be reused
easily for the integration tests
Standardise on a single artifact URI parameter name
java7 autocloseable streams
Add debugging for ontology not in profile exception, and throw HTTP 400
exception for this part, as it will most likely be due to an error in
the data the client is sending
avoid serialising the poddBase:inferredVersion predicate as it is causing issues