following Textures created by Fernando Zapata (CC BY-SA 3.0):
  doors_wood.png
  doors_wood_a.png
  doors_wood_b.png
  doors_brown.png

following Textures created by BlockMen (WTFPL):
  doors_trapdoor.png

following textures created by celeron55 (CC BY-SA 3.0):
  doors_trapdoor_side.png

following textures created by PilzAdam (WTFPL):
  doors_steel.png
  doors_steel_a.png
  doors_steel_b.png
  doors_grey.png
  doors_trapdoor_steel.png
  doors_trapdoor_steel_side.png

following textures by Cisoun (WTFPL):
  default_chest_front.png
  default_chest_side.png
  default_chest_top.png

following textures by TenPlus1 (CC BY-SA 3.0):
  protector_logo.png
  protector_display.png
  protector_overlay.png