Work toward OF overlay renderer.

* Create distribution directory (probably temporary until Karaf) to
  make running easier
* Move endpoint-provider-impl into renderer so that it can be
  augmented
* Stubbed or basic implementations of most of the overlay renderer.

Change-Id: I0c7972c8529d6a93d419915c82918a660935d6ac
Signed-off-by: Rob Adams <readams@readams.net>