Ability to Save Layers in Texture Editing + Ability to Import/Export Layers

Whenever you use layers in a texture and then save the texture, when you reopen it later, the layers are gone. Please add the ability to save the image with layers so it's easier to edit later. Another thing is, I'd like to see the ability to import an image to use as a layer, and export a layer as an image, similar to how the base layers work.