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/popupwin.h

@@ -42,9 +42,9 @@ protected:
     virtual void DoMoveWindow(int x, int y, int width, int height) wxOVERRIDE;
 
 #ifdef __WXUNIVERSAL__
-    DECLARE_EVENT_TABLE()
+    wxDECLARE_EVENT_TABLE();
 #endif
-    DECLARE_DYNAMIC_CLASS(wxPopupWindow)
+    wxDECLARE_DYNAMIC_CLASS(wxPopupWindow);
 };
 
 #endif // _WX_GTK_POPUPWIN_H_