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/msw/dcmemory.h

@@ -36,7 +36,7 @@ protected:
     // initialize the newly created DC
     void Init();
 
-    DECLARE_CLASS(wxMemoryDCImpl)
+    wxDECLARE_CLASS(wxMemoryDCImpl);
     wxDECLARE_NO_COPY_CLASS(wxMemoryDCImpl);
 };