- Updated WINGs/NEWS with info about hw the API changed how how things

are affected. Fixes for old code too.
- Double buffering in WMList. All widgets or apps using WMList and
  having user drawing porcedures in place will inherit this double
  buffering automatically too.
- New functions in WINGs: WMGetColorAlpha(), WMIsAAFont()
- Misc code cleanups in WINGs and src/dialog.c

WINGs/wcolor.c

@@ -342,6 +342,13 @@ WMBlueComponentOfColor(WMColor *color)
 }
 
 
+unsigned short
+WMGetColorAlpha(WMColor *color)
+{
+    return color->alpha;
+}
+
+
 char*
 WMGetColorRGBDescription(WMColor *color)
 {