Added CorridorTile
Upped Player agility from 5 to 7
Added Bottomless Pit Tile
GameMap returns false instead of OutOfBoundsException
Added ChamberOfDarkness Tile
Fixed issue with wrong tiles being displayed
Added one type of Chasm Tile
Made StartingTile closer to rules
Clarified SecretDoor message
Made more clear that "Flee" in combat returns you to previous room
Added new test for rotating tiles
Removed Tile.equals and Tile.hashCode, since they're not needed anymore
Remove disconnects by timeout, I think this fixes issue #1

There were no disconnects since using this call.
KeepAlive packets are still being send, but I think that disabling them too would be bad, since hardware and/or OS can drop connection because of its inactivity.
Tile ID refactoring

Tile ID is now stored inside of Tile, as opposed to comparing with all tiles and returning index of the first hit, and initialized in TileHolder.
Added RotatingRoom tile