Evcxr image

Integration between Evcxr Jupyter and the image crate. Enables display of images in Evcxr Jupyter kernel.

Currently supports all 8 bit per channel formats:

Example usage: ```rust :dep image = "0.23" :dep evcxr_image = "1.1"

use evcxr_image::ImageDisplay;

image::ImageBuffer::from_fn(256, 256, |x, y| { if (x as i32 - y as i32).abs() < 3 { image::Rgb([0, 0, 255]) } else { image::Rgb([0, 0, 0]) } }) ```