Simple 60mm fan bracket for RAMPS

__Note: This is deprecated, see http://www.thingiverse.com/thing:166045 intead__

A minimalist cooling solution for RAMPS: allows attaching a 60mm fan such a way it can be easily removed to tune the stepper drivers. 60mm fans are the exact same width as RAMPS and are less noisy for the same airflow than 40mm equivalent.

*UPDATE*: v2 version (pictured in gray) is slightly taller: 27mm clearance to PCB. That allows it to sit on top of thermal fuses as well.

Additional parts needed: