Added IFF handler.

Minor doc updates.
  Corrected configure for SGI OpenGL (wx-config related).


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13585 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/imagall.cpp

@@ -52,6 +52,9 @@ void wxInitAllImageHandlers()
 #if wxUSE_PCX
   wxImage::AddHandler( new wxPCXHandler );
 #endif
+#if wxUSE_IFF
+  wxImage::AddHandler( new wxIFFHandler );
+#endif
 #if wxUSE_XPM
   wxImage::AddHandler( new wxXPMHandler );
 #endif