Parametric Apple Grater

A parametric OpenScad script to generate the front grill pattern from the new Mac Pro.

Select grill plate thickness, number of rows, number of cups per row, and cup smoothness (going over 100 is not recommended).

Made using the mathematics posted on [isonno](https://www.thingiverse.com/isonno)'s [blog](http://saccade.com/blog/2019/06/how-to-make-apples-mac-pro-holes/).

6-25-19: Added a new version that creates a symmetric top and bottom with the same variables as before, plus the option to add a "frame" around the grill of a desired width (0 disables the frame).