Initiate the http-client-impl project with implementation for Fedora Resource and FedoraRepository.getObject() method.

This PR initiate the http-client-impl project with Fedora Resource and FedoraRepository.getObject() method implemented that we can work on in the next step. There are no unit test added yet and I'll do it later so that it Esme can move ahead with his work.
There is a lot of stuff in here that isn't needed on the client.  We should remove all of the JCR namespace, the Sets of properties, and the Predicates, etc. which would leave us with just the properties the client will see in the REST API responses.