mainly work on object scripting api

data/luaobjects/test/client.lua

data/luaobjects/test/server.lua

minetest.conf.example

src/client.cpp

src/clientobject.cpp

src/defaultsettings.cpp

src/environment.cpp

src/environment.h

src/main.cpp

src/map.cpp

src/map.h

src/mapblockobject.cpp

src/player.cpp

src/porting.cpp

src/server.cpp

src/server.h

src/serverobject.cpp

src/serverobject.h

src/utility.h