threads for socket.send work to avoid server hangup
server SPAWN_POINT option
move player if server sends intersecting block
always ensure chunks within distance 1 chunk
server-side on_block validation
player cube has 6 distinct faces in texture
adding new player texture
Merge pull request #49 from moonsspoon/master

adding new player texture
fix matrix for item
server supports chat, client prints received chats to console

(no support for writing chat messages yet)
Allow holding left, right, and middle click buttons