pothos-library: in progress remote topology support
pothos-library: UID uses heap pointer, previously it could be non-unique stack
pothos-library: continued remote topology work
pothos-library: working across a process - needs proxy work
pothos-library: add call to query pid
pothos-library: working actor interface into block
Merge branch 'master' into remote_topology

Conflicts:
	pothos-library/lib/Framework/Topology.cpp
Merge branch 'remote_topology' into remote_topology_block_methods
pothos-library: removed WorkerActorInterface - proxy directly to worker actor
pothos-library: some comments in WorkerActor.hpp
Merge branch 'remote_topology_block_methods'