KK2.1 Case

UPDATE
-4/23/2013, Added a case with no buttons.
- 2/19/2014, Night: Updated case on thin section between the hole and the buzzer port, and removed two holes near them. Improved alignment of buzzer port and voltage port.
- 2/19/2014, Morning: Screw holes on the old base did not go all the way through, I used a drill to drill them out. I updated the design to have proper holes.

Changes from 3dxl KK2.0 case design:
1) Flipped the case upside down because I did not want to print s