Reverse orientation of switching boards...

Reverse orientation of switching boards, such that the cable connectors
stick out the back of the case.
Add holes on bottom for Arduino switching-board...

Move holes for 40-pin connectors on back-plate down 2mm, to align
properly.

Increase size of hole on back-plate for back of ATX power supply.  This
adds support for power supplies with the power cable socket at the top
_or_ bottom, when power supply is oriented with fan on the left when
looking from the back.

Update SVG files to match the SketchUp model.