Refactor into npm module; publish on npm

[multimeric]

I'm interested in using this tool for a webpack-based project, but for that it would work best if this library was provided as an npm module. Are you interested in a PR to this end?

[chmille4]

Would be very happy to have it.

[multimeric]

Excellent! I'm almost there, I just have one issue. Webpack expects libraries to exported as a single namespace (Scribl in this case), meaning that all the different classes would have to be instantiated using that namespace:

const chart = new Scribl.Scribl(canvas, 500);
const gene1 = track1.addFeature(new Scribl.BlockArrow('track1', 5, 750 , '-'));

This would mean changing some of the examples and documentation. Is that workable?

[chmille4]

It's a breaking change, but I think it's work it to have it as an npm module. So it's good with me.