Parametric Capped Pins

[12 DEC 2020] - Uploaded version 2.4
* Pin shape added: "PIPED": this shape lets you make a hole along the pin axis with desired diameter, so that you can design pair of pins that go together. You may have to work a little on tolerances, but in my tests an OCTAGON shape with a given diameter fits tightly a round PIPED of the same diameter.

[06 DEC 2020] - Uploaded version 2.3
* Pin shape added: "OCTAGON": this was a suggestion made by redditor [riskable](https://www.reddit.com/user/riskable/) on [r/functionalprint subreddit](https://www.reddit.com/r/functionalprint/comments/k6y05c/if_you_ever_need_a_pin_for_your_project_try_my/gepk8vo/?utm_source=reddit&utm_medium=web2x&context=3)

* Groove shape function added: now you can select which shape you want your groove to have: "RECT" or "ROUND". These will produce a groove on the pin length you selected.

* Pins, grooves and splits can be rotated to fit the position you need.

[01 DEC 2020] - Uploaded version 2.2, with new custom