FEATURES/CHANGES ADDED BY MARKM (Changing 0.1 into 0.2)
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- Luxuries rate added. 
- Pixmaps for road, rail, irrigation added. (For road and rail it would
  be prettier to actually draw them in in the specific directions that
  are actually built; all I did was slap in a pixmap showing them going
  in all directions, as a quick fix.)
- Government types were partly supported in the code but there was no
  way to select them, so I added in ANARCHY type and a 
  constantly-maintained list of available types similar to the canBuild 
  and canDiscover lists, set up a 1/3 chance each turn of ANARCHY for a
  selection to pop up allowing choice from available types, and finally 
  added a command for instituting the ANARCHY which, if one owns the 
  pyramids wonder, allows one immediately to choose government type 
  instead of starting the ANARCHY.
- Got rid of GRASS2 terrain type, instead made the little shield type
  grass done by being "goodies"; also added fish "goodies" for water
  terrain and a river type goodie.
- City walls were not affecting combat as other peoples clients did not
  know they existed. So, added telling of others about city walls so that
  they could affect combat.
- Cities were going down to size zero in combat. Fixed it so that at size
  zero they disappear.
- Making settlers was not affecting population. Fixed so that population
  goes down one to make a settler.
- Lowered the incident of "bad random numbers" at startup by the simple
  expedient of lowering default continent size.
