Photon C++ Client API: inc -> Photon-cpp Relation

Photon C++ Client API 4.1.12.2

inc → Photon-cpp Relation

File in Chat-cpp/inc	Includes file in Photon-cpp
Chat-cpp/inc/Listener.h	inc / PhotonPeer.h
Chat-cpp/inc/Peer.h	inc / PhotonPeer.h