Updated files

[JC Lawrence]

Changelog:

Rules touched up with half a dozen or so small wording improvements, mostly around the phases, colours, and trains.
The IPO chart has had the company names removed (don't think they added anything but clutter).
The trains have been redrawn so as to be more colour-blind friendly (I hope -- and think they're kind of silly now).
Small fit and finish improvements to the map.

Summary:

Nothing game-affecting.

-- JCL