Request for sidey theme (originally from Jekyll)

[Ashish Panigrahi]

Hi @tlienart,

Just putting up a request for the sidey theme (https://github.com/ronv/sidey) that's originally Jekyll-based, to be ported for Franklin.jl.

Thanks for all your work on Franklin! I've been using it and love it!
--> https://sidey-jekyll.netlify.com/