Kossel Clear PLA power supply mount V2

** Update ** Changed upright pieces with design from http://www.thingiverse.com/thing:250460. It stays locked in the vertical position without relying on the power supply brick being installed.

Improved version of http://www.thingiverse.com/thing:244891

Wire management is incorporated in this design. String a zip-tie through the hole and tidy up cables.