Tweaks volume of material per sheet in lathes. (#2852)

* Initial

* Tidies up file structure

Resources/Prototypes/Reagents/materials.yml

@@ -0,0 +1,56 @@
+- type: material
+  id: steel
+  name: steel
+  color: gray
+  icon: Objects/Materials/sheets.rsi/metal.png
+  density: 7700
+  electricResistivity: 6.9e-7
+  thermalConductivity: 18
+  specificHeat: 500
+
+- type: material
+  id: glass
+  name: glass
+  color: '#e8f0ff33'
+  icon: Objects/Materials/sheets.rsi/glass.png
+  density: 2500
+  electricResistivity: 1.0e+13
+  thermalConductivity: 0.9
+  specificHeat: 840
+
+- type: material
+  id: rglass
+  name: Reinforced glass
+  color: '#49c9a7'
+  icon: Objects/Materials/sheets.rsi/rglass.png
+  density: 5000
+  electricResistivity: 1.0e+13
+  thermalConductivity: 0.9
+  specificHeat: 5000
+
+- type: material
+  id: gold
+  name: gold
+  icon: Objects/Materials/goldbar_single.png
+  density: 10000
+  electricResistivity: 8.0e-9
+  thermalConductivity: 30
+  specificHeat: 1000
+
+- type: material
+  id: phoron
+  name: phoron
+  icon: Objects/Materials/phoron_sheet.png
+  density: 200
+  electricResistivity: 2.1e-1
+  thermalConductivity: 80
+  specificHeat: 2000
+
+- type: material
+  id: plasteel
+  name: plasteel
+  icon: Objects/Materials/sheet_plasteel.png
+  density: 15400 # literally arbitrary values...
+  electricResistivity: 6.9e-7
+  thermalConductivity: 18
+  specificHeat: 200