se: Use classes for Space, Simulation, & Renderer
se: Use classes for Space, Simulation, & Renderer

This refactors the logic for generating and rendering spaces into
separate classes.

ChrisCummins/chriscummins.github.io,ChrisCummins/chriscummins.github.io,ChrisCummins/chriscummins.github.io,ChrisCummins/chriscummins.github.io,ChrisCummins/chriscummins.github.io