Catan Port Tiles (for hexboards.com extension board)

Remixed from @rbuckbailey's original thing:

http://www.thingiverse.com/thing:53812

However, that design didn't fit the extension board bought from hexboards.com, so I modified it to fit that board.

Extension board found here:

http://hexboards.com/products/5-6-player-catan-boards-extension