Converted remote_ptr to mapped_ptr

p2p-rm/include/ftl/p2p-rm.hpp

p2p-rm/include/ftl/p2p-rm/blob.hpp

p2p-rm/include/ftl/p2p-rm/internal.hpp

p2p-rm/include/ftl/p2p-rm/mapped_ptr.hpp

p2p-rm/src/blob.cpp

p2p-rm/src/p2prm.cpp

p2p-rm/test/CMakeLists.txt

p2p-rm/test/mapped_ptr.cpp

p2p-rm/test/p2p-rm.cpp