Start breaking world.cpp into multiple files

luprex/core/Makefile

@@ -13,13 +13,14 @@ CPP_FILES=\
 	cpp/globaldb.cpp\
 	cpp/sched.cpp\
 	cpp/table.cpp\
-	cpp/tablecmp.cpp\
 	cpp/gui.cpp\
 	cpp/luasnap.cpp\
 	cpp/animqueue.cpp\
 	cpp/streambuffer.cpp\
 	cpp/source.cpp\
 	cpp/world.cpp\
+	cpp/world-difftab.cpp\
+	cpp/world-pairtab.cpp\
 	cpp/textgame.cpp\
 	cpp/main.cpp