Wrote code to exchang FID state using gm.
Merge branch 'PhysicalTopology' of github.com:scj7t4/FREEDM into PhysicalTopology

Conflicts:
	Broker/src/CPhysicalTopology.hpp

- Changes to clean up GM
- Adds FID state to AYC messages and responses.
- Adds available variable to physical topology to determine if topology has been loaded