various kinds of plots

it seems like plotly for rust doesn't support plotting these:

1. 3d mesh (https://plotly.com/python/3d-mesh/)
2. image loaded from disk/stored in array (https://plotly.com/python/imshow/)

am i right?

these features would be very nice to have.

(i am using evcxr in jupyterlab in linux)

Happy to receive pull requests for new plot types. It's faitly straightforwards if you copy the style of other plot implementations. It's then mostly just a case of transcribing the plotly.js docs into Rust structs/enums.

Closed by #88 - thanks very much on initiating this :)