spacebar models

PLEASE NOTE: you should probably be using my other script to generate these: https://www.thingiverse.com/thing:468651

nondished is a completely straight spacebar; dished has a slight depression across the key, curved has a reverse dish (like on most spacebars), and curvedrounded is my attempt at modeling the DSA bulge along the sides (which is difficult or impossible to do in SCAD)