Support drawing images to display

Merged Rafael Caricio requested to merge rafael/rust-card10:embedded-graphics into master

I was looking for an easy way to allow drawing images to the display. I found the embedded graphics library that supports images and also contains a series of interesting features we would be able to use like primitives drawing and other fonts. I think it's an interesting addition to this project.

Anyways, thank you for the great rust support on card10! :)

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