Customizable Ornament (Inspired by Blown Glass)

I wanted to 3D-print some Christmas ornaments in the style of the blown-glass ones my parents had. Ryan A. Colyer's [Plot Function library](https://www.thingiverse.com/thing:2391851 "thing:2391851") made it possible!

Code update Dec 13 '17: I have added an automatic calculation to fit the shape to the cap, but you can still adjust it yourself. Parameters to smooth ripples near the tip and/or cap can improve prinatbility. Several parameters have been moved to an "advanced-tweaks" section so yo