Cleaned prefab parser a lot

src/dawnopengl/scene/components/display/material/SimpleTexturedMaterial.hpp

@@ -9,7 +9,9 @@
 namespace Dawn {
   class SimpleTexturedMaterial : public Material {
     public:
+      // @optional
       Texture *texture = nullptr;
+      // @optional
       struct Color color = COLOR_WHITE;
 
       /**