Use conn.export to a model to open up possibility of another method
Add alternative PoddOWLManager.parseRDFStatements(Model) method

This method is preferred in situations where there is no repository

It is reused in the case of their being a repository
Remove PoddOWLManager.parseRDFStatements from public API

Only used internally, so reducing the public API to the minimal set of
methods necessary.

Required movement of the tests to the concrete test case, where the
implementation is known.