jdorje: Introduce the concept of "native" positions,...

This is an automated notification of a change to freeciv cvs, 
on Wed Jul 23 13:24:36 PDT 2003 = Wed Jul 23 20:24:36 2003 (GMT)
by Jason Dorje Short <jdorje@xxxxxxxxxxxxxxxxxxxxx>

---- Files affected:

freeciv/common map.h
freeciv/doc HACKING
freeciv/server gamelog.c

---- Log message:
      Tag: HEAD

Introduce the concept of "native" positions, different from "map"
positions.  Add conversion functions map_to_native_pos and
native_to_map_pos to translate to and from the coordinate system.  Use
native positions in one place, and add a lot of explanation of iso-maps
and different coordinate systems to the HACKING file.

See PR#3936.