[Rails-devel] Changes

[Erik V. <eri...@xs...>]

On popular demand, I have reverted the removal of the full train cost string
in the Game Status window.

Fixed some issues with 1835 (all reported by Stefan Frey):
- PfB extra tile/token lay hex is L6, not J6
- Added many missing tile upgrade options
- Fixed token lay cost calculation. In a misguided attempt to be efficient,
I created a complex algorthm that did not always find the shortest path. The
search is now brute force, and not noticeably slower (although it takes more
memory).

A general fix is that the message "You must buy a train unless you have no
route" is only displayed for companies that must own a train.

Erik.