WEBGL versions of P3D examples

[shiffman]

I'm opening an issue to track porting WEBGL versions of Processing P3D examples for processing.org. I am happy to take this on, I would hope to get to it this fall. @indefinit let me know timing wise when this might be good to think about doing. @alignedleft, we'll want to make sure we're staying up-to-date with latest p5.js.

Example: https://processing.org/examples/explode.html

[indefinit]

This sounds like a great idea. I'll add the webgl label as well, but otherwise sounds good!

[indefinit]

Spoke too soon. Looks like I'm unable to add a new label... Can you add it on your end?