Parametric pegboard hooks

I just mounted these plastic pegboards, and their holes didn't seem to be the same as the ones used by the majority of the pegboard mounts that are on thingiverse, so I made my own.

peg.scad is a library I've made to generate filleted pegs that you can slap onto any existing design.

This thing uses:

- [MCAD's dev branch](https://github.com/openscad/MCAD/tree/dev/)
- A modified version of [Clothbot's fillet library](https://github.com/clothbot/ClothBotCreations/blob/master/utilities/