DoodleBUGS: Backend

[shravanngoswamii]

Let's experiments few things first for DoodleBUGS backend, I am thinking of trying out something like Google Colab's local runtime feature: https://research.google.com/colaboratory/local-runtimes.html

I will try this with Genie.jl

[shravanngoswamii]

Partially, we have a working backend as of now -- #388