Paring down size of animations

[gforsyth]

We need a strict limit on the number of frames in any JSAnimation used in a notebook. I don't think there's a case to made for any animation > 100 frames and the size of the notebooks is becoming an issue.

We're biasing availability of material towards those with faster internet connections which isn't cool.

[labarba]

👍

What is a good size limit? Maybe a soft limit at 5MB and a hard limit at 20MB? (any limit is arbitrary, but we can revisit or issue "pardons" on a case-by-case)

[gforsyth]

I would prefer a hard limit under 10MB. If people clone the whole repo and there are 9 >10MB lessons in there it's going to be a beast