-Change: make readme.txt UTF-8 instead of ISO 8859-15.
-Change: some indenting, aligning and other small textual changes.
-Add: some comments about port forwarding and NewGRF over the net..
Via this commit I wanted to thank everyone who helped with this new
network, with some people by name: Bjarni, for Endian support,
Hackykid, for Masterserver and ingame server-list, Geniusdex, for
suggestions and bug reporting, Darkvater, for the Windows testing,
Tron, for his comments and suggestions for the network, sign_de, for his
general help around the network, orudge, for his kind offer to host
our masterserver, dominik, for the network GUI, and all the others I
did not mention or forgot. Thank you all :)