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/dirdlg.h

@@ -57,7 +57,7 @@ protected:
 private:
     wxString m_selectedDirectory;
 
-    DECLARE_DYNAMIC_CLASS(wxDirDialog)
+    wxDECLARE_DYNAMIC_CLASS(wxDirDialog);
 };
 
 #endif // __GTKDIRDLGH__