Added a few #if wxUSE_XXX

Regrouped image format handlers
  Updated the rest accordingly
  Added changes.txt for wxGTK


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2795 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk1/choice.h

@@ -15,6 +15,9 @@
 #endif
 
 #include "wx/defs.h"
+
+#if wxUSE_CHOICE
+
 #include "wx/object.h"
 #include "wx/list.h"
 #include "wx/control.h"
@@ -96,4 +99,6 @@ public:
     void ApplyWidgetStyle();
 };
 
+#endif
+
 #endif // __GTKCHOICEH__