(svn r5946) -Add: merged the TGP branch to mainline. TGP adds:

- New optional landscape generator (TerraGenesis Perlin)
  - Load heightmaps (either BMP or PNG)
  - Progress dialog while generating worlds (no longer a 'hanging' screen)
  - New dialogs for NewGame, Create Scenario and Play Heightmap
    - Easier to configure your landscape
    - More things to configure (tree-placer, ..)
  - Speedup of world generation
  - New console command 'restart': restart the map EXACTLY as it was when you
      first started it (needs a game made after or with this commit)
  - New console command 'getseed': get the seed of your map and share it with
      others (of course only works with generated maps)
  - Many new, world generation related, things
  - Many internal cleanups and rewrites
  Many tnx to those people who helped making this:
     Belugas, DaleStan, glx, KUDr, RichK67, Rubidium, and TrueLight (alfabetic)
  Many tnx to those who helped testing:
     Arnau, Bjarni, and tokai (alfabetic)
  And to all other people who helped testing and sending comments / bugs
  Stats: 673 lines changed, 3534 new lines, 79 new strings

town_cmd.c

@@ -28,6 +28,7 @@
 #include "bridge.h"
 #include "date.h"
 #include "table/town_land.h"
+#include "genworld.h"
 
 enum {
 	/* Max towns: 64000 (8 * 8000) */
@@ -1054,7 +1055,10 @@ bool GenerateTowns(void)
 	uint num = 0;
 	uint n = ScaleByMapSize(_num_initial_towns[_opt.diff.number_towns] + (Random() & 7));
 
+	SetGeneratingWorldProgress(GWP_TOWN, n);
+
 	do {
+		IncreaseGeneratingWorldProgress(GWP_TOWN);
 		// try 20 times to create a random-sized town for the first loop.
 		if (CreateRandomTown(20, 0) != NULL) num++;
 	} while (--n);