CraftItem rework and Lua interface

data/mods/default/init.lua

src/CMakeLists.txt

src/client.cpp

src/client.h

src/clientserver.h

src/content_sao.cpp

src/content_sao.h

src/game.cpp

src/gamedef.h

src/inventory.cpp

src/inventory.h

src/player.cpp

src/player.h

src/scriptapi.cpp

src/scriptapi.h

src/server.cpp

src/server.h

src/servercommand.cpp

src/serverobject.h

src/utility.cpp