Node definition names

src/CMakeLists.txt

src/client.cpp

src/client.h

src/content_mapnode.cpp

src/content_mapnode.h

src/gamedef.h

src/map.cpp

src/mapblock.cpp

src/mapblock.h

src/mapnode.cpp

src/mapnode.h

src/nameidmapping.cpp

src/nameidmapping.h

src/nodedef.cpp

src/nodedef.h

src/serialization.h

src/server.cpp

src/server.h