Add menucolors

-Add a boolean option menucolors to toggle menu color
-Add MENUCOLOR -config file option

TODO:
-Better support for win32
-Support more windowports
-Update Guidebook
-Allow changing menucolor lines in-game

win/win32/mhmap.h

@@ -12,6 +12,7 @@
 #include "global.h"
 
 
+COLORREF nhcolor_to_RGB (int c);
 HWND mswin_init_map_window (void);
 void mswin_map_stretch(HWND hWnd, LPSIZE lpsz, BOOL redraw);
 int mswin_map_mode(HWND hWnd, int mode);