Add charting function, test page
Animated graph test
Add viewBox attribute on test chart

workaround for https://bugs.webkit.org/show_bug.cgi?id=114578
Slower random Jenny to understand flicker

I've come to the conclusion it's not worth understanding
Better initial viewbox handling in charting.js
Pad line segments in charts by 2

This way, the line segment that's getting repurposed doesn't immediately disappear from the other side. This is more noticable at fatter stroke weights.
Speed up graph test
Using moving index rather than shifting array of strokes
Add magnitude to things sent to debugCb by stepDubber
Add first crack at charting mechanism to header