Add feature to render plot into html or image

[giomf]

It would be helpful if it were possible to render a plot in html or an image format directly in Plotlars as it is currently possible in plotly.

As a workaround Im using this code:

use plotly::Plot as PlotlyPlot;
let mut plot = PlotlyPlot::new();
plot.set_layout(lineplot.get_layout().clone());
plot.add_traces(lineplot.get_traces().clone());
plot.write_html("./data.html");

[alceal]

Thank you for comment. I've just added the chance to write into html. The other option will be added in a future version.

[giomf]

Ah I was just about to open a pull request. I will check it out. Thanks!

[alceal]

plotly/plotly.rs#241