Use wx-prefixed macros throughout the repository.

Change {DECLARE,IMPLEMENT}_*CLASS and {DECLARE,BEGIN,END}_EVENT_TABLE
occurrences to use the wx-prefixed version of the macros.

include/wx/gtk/button.h

@@ -67,7 +67,7 @@ private:
     // Return the GtkLabel used by this button.
     GtkLabel *GTKGetLabel() const;
 
-    DECLARE_DYNAMIC_CLASS(wxButton)
+    wxDECLARE_DYNAMIC_CLASS(wxButton);
 };
 
 #endif // _WX_GTK_BUTTON_H_