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.

tests/test.cpp

@@ -386,7 +386,7 @@ private:
 #endif // wxUSE_GUI
 };
 
-IMPLEMENT_APP_NO_MAIN(TestApp)
+wxIMPLEMENT_APP_NO_MAIN(TestApp);
 
 
 // ----------------------------------------------------------------------------