Wave can organizer remake configurable

I liked the idea of http://www.thingiverse.com/thing:711054, but the fragments annoyed me, so I recreated it from scratch in OpenSCAD.

Use customizer:

* Change it to be a 3 can version that will easily fit on 6inch beds
* Generate it for a different can diameter
* Change the ends and the between can sections

I'm tempted to make one that could lock together at the edges to make it more stable. I also want to make cutouts to reduce the amount of fill area.

This has options for how the ends are rendered, and how the inner can sections are rendered.