Code pulled from MTG licensed as:
GNU Lesser General Public License, version 2.1
Copyright (C) 2011-2018 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2011-2018 Various Minetest developers and contributors

celeron55, Perttu Ahola: CC By-sa 3.0 MTCORE32px
Lava, Water, and Riverwater textures.


AGFX (CC BY 3.0):
  https://www.freesound.org/people/AGFX/packs/1253/
  water.*.ogg
