Integrated vibration dampening Omnimac / Sypda 500 body plate

An integrated body plate for the [Spyda 500 quadcopter](http://www.thingiverse.com/thing:160607). This was inspired by a similar integration: http://www.thingiverse.com/thing:225801. The main difference is the model geometry has been unified maintaining the access holes.

Note: The build plate holes are in the DJI pattern, not the Crossfire.