Skin, on 2.64 test

From the 2.64 version of Blender has 'Skin' modifier. It's very interesting modifier for modeling. Cause of the change of API after 2.63, I need a different method for next GMP. This is the first test version of using 'Skin' modifier in the python code. In this style, I could make 'fingers'! How do you think this?