PrintrProbe Z-Probe Mount for 2014 Makers Simple Kit

V2: Made the mounting plate thinner so that, hopefully, longer M3 screws aren't needed. Also, made the nut catch where the probe mounts a little smaller/deeper for better mounting of the probe.

I've tried out a number of probe mounts each one with their own issues. I figured rather than sitting around waiting for someone to make one that works 100% (The one on Printrbot's website isn't even for the 2014 simple, though is says it is) I set out to grab what I liked from other designs and make