Add shoebot

[villares]

https://shoebot.github.io/shoebot/

Shoebot

It takes a Python script as input, which describes a drawing process, and outputs a vector graphic in a common open standard format: SVG, PDF, PostScript or PNG. It works through simple text files, and scripts can describe their own GUIs for controlling variables interactively. It can also be used as a Python module, a plugin for Python-scriptable tools such as Inkscape, and run from the command line without a GUI for automated tasks.

Shoebot is a port/rewrite of Nodebox 1. It was also inspired by DrawBot and Shoes. Thus, "Shoebot".