Portaberry Pi combined case top and base

A slight remix of 3Derp's sweet design once again. This case has all the face plate additions combined in a single mesh -- makes the unit slightly more compact and streamlined -- I like the look.

I plan to update the 'how-to' to make changes based on RetroPie 2.3 as well as an updated wiring figure (found a few errors in my own document).

Thanks again to 3Derp for coming up with all this -- everything I have done to date is really just a mixup of his meshes.