Tricopter tilt mechanism

Having found nothing that fits a 15mm square boom - linkage free - , I designed one. Here it is.

* Protects motor shaft and bearing
* Full 180 degres range, servo is never going to bind
* The screw can't fall out
* Enough space on the side to ziptie the esc.
* Grip for the zipties that hold the servo

Solidworks files included.

##Changelog
- 07/23/2015 - The motor mount now has a lower profile. That was a weakpoint.