Is there a way to have default mesh objects come with premarked UV unwrapping seams? I was thinking it might be useful to have default mesh object such as cubes, cylinders or other objects like the platonic solids etc from addons to default to come with premarked UV unwrapping seams when added to a scene. Is there a way to do this, perhaps with the startup file? Here is an example of what I was thinking about:
Is this what you're looking for?

This creates a UV layout for an object on creation and is a feature in 2.77. You can download RC2 from the institute now.