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/xrc/xh_grid.h

@@ -16,7 +16,7 @@
 
 class WXDLLIMPEXP_XRC wxGridXmlHandler : public wxXmlResourceHandler
 {
-    DECLARE_DYNAMIC_CLASS(wxGridXmlHandler)
+    wxDECLARE_DYNAMIC_CLASS(wxGridXmlHandler);
 
 public:
     wxGridXmlHandler();