Blending mode inheritance

[frantufro]

Using blending modes with MOAILayer2D I ran into a situation that is somehow counterintuitive.

When you add a prop to a layer, I'd expect it to inherit the layer's blending mode. In that way, I could use a layer to draw shadows.

Do you think this should be the expecter behaviour? I can implement it if you think like me.

[patrickmeehan]

Basically, yes. But let me think about that a bit. I am going to be working on props and layers again soon, so that will be a good time to look into this.