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

src/decl.c

@@ -219,6 +219,8 @@ NEARDATA struct c_color_names c_color_names = {
 	"white"
 };
 
+struct menucoloring *menu_colorings = NULL;
+
 const char *c_obj_colors[] = {
 	"black",		/* CLR_BLACK */
 	"red",			/* CLR_RED */