Including a map and station extras

I've made some small but impactful improvements to the game thanks to some great feedback from reviewers and playtesters,

The game is completely self contained now. There is a map and a log for 3 different difficulty levels. Those who which can still play the game with a downloaded subway map.

Also, the tunnels and stations felt exactly the same in the previous version. This update includes a separate table to roll on for stations, making them feel more significant than tunnels. It is still deadly, but now there are some extra things that can happen in a station that won't happen in a tunnel. This increases the fun factor!