Ability to clear and re-draw about roughviz

[MintyMods]

I got it to work using the following hack:-

   chart.svg.selectAll("*").remove();
   chart.drawChart();

but agree a redraw call would be cleaner.
Linking #9

[jwilber]

+1
Will add update function to do this that can take new data.
Possible pain point: smooth transition of rough paths.

[epykure]

I would like to integrate this nice charting library to our Python ecosystem but I cannot find any details on a JavaScript API to update chart, add points, or change the options. Is it in the roadmap ?
If you are interested this is what I manage to get for the time being: https://epykure.github.io/demos/charts/roughViz.html.

Thanks

[jwilber]

.redraw() method added in v2