Written first methods for teleporting the player - check if player has
reached a tunnel and getting the coordinates for the entryhole and
exithole.
Included new methods for getting the tunnels on the gameboard.
created methods for drawing a tunnel, consisting of two separate tunnel
holes.
test arena.
included methods to create tunnel holes at arbitrary coordinates.
implemented generating of a list for all possible slots on the gameboard
where a tunnel hole could spawn.
added new arena config-file.
modified initialization of gameboard and included tunnel spawning.