needs to also specify a texture atlas if we're going to make this standalone

src/main/java/ca/blarg/gdx/tilemap3d/json/tilemesh/JsonMaterialMapping.java

@@ -12,5 +12,6 @@ public class JsonMaterialMapping {
 		public float maxV;
 	}
 
+	public String textureAtlas;
 	public ArrayList<Material> materials;
 }