[Freeciv-Dev] terrain ruleset implementation in CVS

[David Pfitzner <dwp@xxxxxxxxxxxxxx>]

Hi people,

I have put Jeff's terrain-ruleset patch into CVS.
This changed lots of stuff, so please watch out for
any problems are report them as usual.  This is intended
to work properly even with old/existing savegames, so 
report any problems with them too.

Note this breaks old tilesets, because of the change
in the dimensions of tiles.xpm (and the required new
rivers and specials tiles).  The tilesets in CVS are 
updated, but if you are using other tilesets, they won't 
work unless you fix them yourself.  Improvements to the 
added tiles, or updated other tilesets, are of course 
welcome!  

Regards,
-- David