Merge branch 'flags_to_dict' into 'master'

Export Flags.ToDict to python

See merge request jschoeberl/netgen!425

libsrc/core/python_ngcore_export.cpp

@@ -177,6 +177,10 @@ PYBIND11_MODULE(pyngcore, m) // NOLINT
 
 	  return py::cast(self.GetDefineFlag(name));
       }, py::arg("name"), "Return flag by given name")
+    .def("ToDict", [](const Flags& flags)
+    {
+      return CreateDictFromFlags(flags);
+    })
   ;
   py::implicitly_convertible<py::dict, Flags>();