Minimal player_api alternative.

Player model and texture taken from player_api in Minetest Game, see:

Authors of media (textures, models and sounds)
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Original model by MirceaKitsune (CC BY-SA 3.0).
Various alterations and fixes by kilbith, sofar, xunto, Rogier-5, TeTpaAka, Desour,
stujones11, An0n3m0us (CC BY-SA 3.0):
  character.b3d
  character.blend

Jordach (CC BY-SA 3.0):
  character.png