Merge pull request #1 from substack/master

voxel collision detection
highlight current chunk and log if in a voxel or not
adjust height of voxel collision
dat squiggle
use Math.floor
make it work again
add log statements for voxel status
add getCollisions function and voxelAtPosition function
use modulo instead of abs so the other quadrants work
use voxelSource.chunkSize instead of hard-coding 32