Iterate on graphics design

Do a pass on the designs adding shading and improving their look.

src/changelog.txt

@@ -1,4 +1,10 @@
 ------------------------------------------------------------------------------------------------------------
-Version: 0.1.1
+Version: 0.2.0
 Changes:
   - Renamed mod to Colour Blind Friendly Science Packs
+  - Scaled to better match sizes of the items.
+  - Added faux shading.
+  - Fixed mesh issues with green and yellow sciences.
+  - Made purple consistent with the other sciences.
+  - Added base for white scinece.
+  - Made black science darker.

src/data.lua

@@ -1,30 +1,30 @@
 local items = {
     ["automation-science-pack"] = {
-        icon_size = 256,
+        icon_size = 128,
         icon = "__cb-science__/graphics/red.png",
     },
     ["logistic-science-pack"] = {
-        icon_size = 256,
+        icon_size = 128,
         icon = "__cb-science__/graphics/green.png",
     },
     ["military-science-pack"] = {
-        icon_size = 256,
+        icon_size = 128,
         icon = "__cb-science__/graphics/black.png",
     },
     ["chemical-science-pack"] = {
-        icon_size = 256,
+        icon_size = 128,
         icon = "__cb-science__/graphics/cyan.png",
     },
     ["production-science-pack"] = {
-        icon_size = 256,
+        icon_size = 128,
         icon = "__cb-science__/graphics/purple.png",
     },
     ["utility-science-pack"] = {
-        icon_size = 256,
+        icon_size = 128,
         icon = "__cb-science__/graphics/yellow.png",
     },
     ["space-science-pack"] = {
-        icon_size = 256,
+        icon_size = 128,
         icon = "__cb-science__/graphics/white.png",
     },
 }