Document a few derived textures

Thanks to cx384 for providing this input

technic/README.md

@@ -1,14 +1,16 @@
-Technic
-=======
+# Technic (main mod)
 
-License
--------
+
+## License
+
+### Code
 
 Copyright (C) 2012-2014 Maciej Kasatkin (RealBadAngel)
 
 Technic chests code is licensed under the GNU LGPLv2+.
 
-Texture licenses:
+
+### Textures
 
 BlockMen modified by Zefram (CC BY-SA 3.0):
   * technic_chernobylite_block.png
@@ -24,15 +26,29 @@ sdzen (Elise Staudter) (CC BY-SA 3.0):
 leftshift (CC BY-SA 3.0):
   * technic_river_water_can.png
 
+Neuromancer vis Minetest Game (CC BY-SA 3.0)
+ * `technic_*_electric_furnace_*.png` (derived)
+
+[LB Photo Realism Reload](https://www.curseforge.com/minecraft/texture-packs/lb-photo-realism-reload) (CC 0)
+ * `technic_geothermal_*.png` (derived)
+ * `technic_water_mill_*.png` (derived)
+ * `technic_*_alloy_furnace_*.png` (derived)
+ * `technic_*_compressor_*.png` (derived)
+ * `technic_*_grinder_*.png` (derived)
+
 RealBadAngel: (WTFPL)
   * Everything else.
 
-CC BY-SA 3.0: <http://creativecommons.org/licenses/by-sa/3.0/>
 
-Sound licenses:
+### Sounds
 
 veikk0 (Veikko Mäkelä) (CC BY-SA 4.0):
   * technic_hv_nuclear_reactor_siren_danger_loop.ogg
     * Derived from "Nuclear alarm.wav" by Freesound.org user rene___ from <https://freesound.org/people/rene___/sounds/56778/>. Originally licensed under CC0 1.0 <https://creativecommons.org/publicdomain/zero/1.0/>
 
-CC BY-SA 4.0: <https://creativecommons.org/licenses/by-sa/4.0/>
+
+### References
+
+CC BY-SA 3.0: http://creativecommons.org/licenses/by-sa/3.0/
+
+CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/