remove OpenCV repo
remove unnecessary design, text, and output files
use defined pi instead of Math/PI in rotate
standardize output formatting

- add spaces before parentheses and after commas
add minkowski and color transformations
match organization to OpenSCAD documentation

- see the Cheat Sheet at <http://www.openscad.org/documentation.html>
Merge pull request #12 from mattwidmann/master

Add `minkowski` and `color` transformations and general clean up