HamStudy.org branded spinner caps

I quite enjoy the tri fidget spinner toy from @2ROBOTGUY, so I thought just for fun I'd make a cap with the HamStudy.org "A" logo embossed on it so that everyone can show their ham radio pride while they play with something completely unrelated to ham radio.

Hams are about the most fidgety people I know, so it should fit well :-P

Edit: Some prefer a socketed cap, so I added those as well.

Edit May 6, 2017: Just added `HamStudy spinner cap.stl` which is what we're going to use for the on