New Feature: Added up to 15 game difficulty settings (by Jazz)

- Externalized the difficulty setings to "TableData\DifficultySettings.xml" file
- Some INI Settings (ja2_options.ini, CTHConstants.ini and Creature_Settings.ini) moved from INI file to this xml file
- see #define DIFFICULTY_SETTING

git-svn-id: https://ja2svn.mooo.com/source/ja2/trunk/GameSource/ja2_v1.13/Build@7447 3b4a5df2-a311-0410-b5c6-a8a6f20db521

GameSettings.h

@@ -5,6 +5,10 @@
 #include "Strategic Status.h"
 #include "Morale.h"
 
+#ifdef DIFFICULTY_SETTING
+#include "GameInitOptionsScreen.h"
+#endif
+
 
 #define				GAME_INI_FILE					"Ja2.ini"
 
@@ -185,6 +189,18 @@ enum
 	DIF_LEVEL_HARD,
 	DIF_LEVEL_INSANE,
 	DIF_LEVEL_FIVE,
+	#ifdef DIFFICULTY_SETTING
+	DIF_LEVEL_6,
+	DIF_LEVEL_7,
+	DIF_LEVEL_8,
+	DIF_LEVEL_9,
+	DIF_LEVEL_10,
+	DIF_LEVEL_11,
+	DIF_LEVEL_12,
+	DIF_LEVEL_13,
+	DIF_LEVEL_14,
+	DIF_LEVEL_15,
+	#endif
 };
 
 //Enums for the difficulty levels