Expose trace properties somehow

I would like to be able to modify, e.g., the color and linewidth:

https://plot.ly/javascript/line-charts/#line-and-scatter-styling

of the current graphs. These properties are associated with the traces which is data returned by the server. I don't know what a good way to do this is, but it would be nice if it could be configured in the .yml file, though I realize that might be tricky...

Assigning to Patrick, but please reassign to e.g., Hunter.