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/imagjpeg.h

@@ -43,7 +43,7 @@ protected:
 #endif
 
 private:
-    DECLARE_DYNAMIC_CLASS(wxJPEGHandler)
+    wxDECLARE_DYNAMIC_CLASS(wxJPEGHandler);
 };
 
 #endif // wxUSE_LIBJPEG