Revert "Remove voxel-commands from demo"

This reverts commit 34a62584c9e6fe1444634137357108c77627f08b.
Revert "Log chunk data array for debugging"

This reverts commit db42c1ec0daf95646792bfe73a5bc0ce13725575.
Set spawn position from mineflayer 'game' event (spawn packet received)

Now you can see the chunks in-game...