Split settings into seperate source and header files

build/android/jni/Android.mk

src/CMakeLists.txt

src/client.cpp

src/clientiface.cpp

src/clientmedia.cpp

src/content_cao.cpp

src/content_mapblock.cpp

src/content_sao.cpp

src/database-leveldb.cpp

src/database-sqlite3.cpp

src/emerge.cpp

src/environment.cpp

src/guiEngine.cpp

src/inventorymanager.cpp

src/keycode.cpp

src/map.cpp

src/mapgen.cpp

src/mapgen.h

src/nodedef.cpp

src/player.cpp