use voxpopuli as the world renderer

[max-mapper]

instead of the custom voxel.js scene I have in here it would be SO AWESOME to use http://deathcap.github.io/voxpopuli/ as the client

@deathcap any thoughts on how to best do this? The code that needs to be swapped out is here https://github.com/maxogden/blockplot/blob/master/js/voxel.js#L41

[deathcap]

The engine from https://github.com/deathcap/voxpopuli is now available in: https://github.com/voxel/voxel-engine-stackgl