Parametric ergonomic support for Apple Magic Trackpad

I love my Magic Trackpad but find the flat angle can aggravate my wrist's repetitive stress injury. I designed this little platform to hold it at a slight angle so my hand can rest in a more natural position.

I've included customizer tags so you can adjust it for right or left handedness, and adjust the angle to your own comfort preference.

This OpenSCAD library is part of the [dotscad](https://github.com/dotscad/dotscad) project, an open collection of modules and Things for 3d printi