added texture for gold idol

The idol was once just a temporary placeholder that was to be replaced immediately. But apparently, we won't replace it anytime soon.
So we should at least give it a basic texture for the next release...

planet/Objects.ocd/Structures.ocd/Idol.ocd/GoldIdol.material

@@ -0,0 +1,21 @@
+material GoldIdol 
+{
+    receive_shadows on
+    technique
+    {
+        pass
+        {
+            ambient 0.9 0.9 0.9 1.0
+            diffuse 0.9 0.9 0.9 1.0
+            specular 0.9 0.9 0.9 1.0 12.5
+            emissive 0.0 0.0 0.0 1.0
+
+            texture_unit 
+            {
+                texture GoldIdol_UV.jpg
+                tex_address_mode wrap
+                filtering trilinear
+            }
+        }
+    }
+}

planet/Objects.ocd/Structures.ocd/Idol.ocd/Scene.material

@@ -1,14 +0,0 @@
-material Material
-{
-	receive_shadows on
-	technique
-	{
-		pass
-		{
-			ambient 0.500000 0.500000 0.500000 1.000000
-			diffuse 0.630130 0.531432 0.000000 1.000000
-			specular 0.266613 0.266613 0.266613 1.000000 12.500000
-			emissive 0.000000 0.000000 0.000000 1.000000
-		}
-	}
-}