Ribbon Data Cable Maker -- Parametric

After making the data cable maker that uses round cables ( http://www.thingiverse.com/thing:910194 ), I got several requests for a similar thing that would use ribbon cable. The defaults for this script work well with old IDE or serial flat ribbon cables, at least the ones I have in my "old wires" box.

Assembly video: https://vid.me/QjY2

Break-away header pins for use in this project:
https://www.adafruit.com/products/392
https://www.sparkfun.com/products/116

Limitations:
The "round cable" version I made first had a lot of options and the source is also a nightmare. The source on this is still probably somewhere between "very bad dream" and "nightmare" stage (I'm still learning), but here I simplified things a great deal so that I have some hope in the future of being able to follow along with the script. So here are some missing parts:

• Only prints a single column version. When I do a double column version, I'll do that separately.
• Always prints the wire separators.
• No indicator bump, but the top surface is convenient for writing pin numbers.
• Does not include required adjustments for female headers.