ELPA: New package: nano-theme

[Nicolas P. Rougier (inria)]

Dear all,

I would like to submit a new package to ELPA which is a theme 
based on Material colors (https://material.io/) for the light 
version and Nord colors (https://www.nordtheme.com/) for the dark 
version. The theme itself is made of (only) 6 different faces and 
the rationale is here: https://arxiv.org/abs/2008.06030

The theme is hosted at https://github.com/rougier/nano-theme and 
the README displays what it looks like. Note that the theme 
exploits face inheritance a lot and Eli explained me that it might 
degrade performances. I don't know if this needs to be fixed.

Best,
Nicolas