- API change in WINGs for WMDraw*String().

WMDrawString() and WMDrawImageString() now take WMColor instead of GC as
  arguments. WMDrawImageString() receives 2 colors (text & background).
  This is to allow easy extension for Xft/Xrender and hide X low level details
- Added alpha channel to WMColor. 2 new functions also:
  WMCreateRGBAColor() and WMSetColorAlpha()
- Miscelaneous code cleanups in wtext.c
- Removed obsoleted acconfig.h and implemented its functionality using
  AC_DEFINE and AC_DEFINE_UNQUOTED as autoconf 2.5x recommends.
  This will definitely enforce the need to use autoconf 2.5x

WINGs/wview.c

@@ -560,10 +560,10 @@ W_SetViewBackgroundColor(W_View *view, WMColor *color)
     view->backColor = WMRetainColor(color);
 
     view->attribFlags |= CWBackPixel;
-    view->attribs.background_pixel = color->color.pixel;
+    view->attribs.background_pixel = W_PIXEL(color);
     if (view->flags.realized) {
 	XSetWindowBackground(view->screen->display, view->window, 
-			     color->color.pixel);
+			     W_PIXEL(color));
 	XClearWindow(view->screen->display, view->window);
     }
 }