Quaternions for OpenScad

Having some basic Matrix math operations available in OpenScad has been a wonderful thing. I found my life to be somewhat lacking though because rotations are a royal pain in the...

This thing adds Quaternion support to OpenScad

Besides sounding like a cool name for an 80s rock band, or a futuristic diabolical planetary leader, quaternions are a math construct that make doing rotations a fairly painless task.

basically: myquat = quat(axis, angle);

So, to do a 30 degree rotation aro