Move all common mods back to minetest_game

mods/dye/README.txt

@@ -0,0 +1,15 @@
+Minetest 0.4 mod: dye
+======================
+
+See init.lua for documentation.
+
+License of source code and media files:
+---------------------------------------
+Copyright (C) 2012 Perttu Ahola (celeron55) <celeron55@gmail.com>
+
+This program is free software. It comes without any warranty, to
+the extent permitted by applicable law. You can redistribute it
+and/or modify it under the terms of the Do What The Fuck You Want
+To Public License, Version 2, as published by Sam Hocevar. See
+http://sam.zoy.org/wtfpl/COPYING for more details.
+