Tweaked Minion RAMPS 1.4 for MPCNC

Thank you technomastermind for your original design.
Thank you Allted for creating the MPCNC.

The original design of this case did not fit my Arduino board. The power jack and USB were almost 5mm to the right. As I started tweaking the design to fix this, I choose to use a smaller fan and place it on the end. This may prove to provide insufficient airflow, but I'll cross that bridge when I come to it. Removing the fans from the side allowed for a narrower design, so many of these parts w