maze.ocs: make rubies sparkle even when collected
maze.ocs: add a little turbulence to tunnels and caves
Enough turbulence to let it look more natural but not so much that it creates more than a few narrow passageways which must be mined through. This is quite a discreet change.
add a "story" and German description for maze.ocs (now aka Heart of the Mountain)
replace jar of winds with windbag in scenario description