message: adding unsetOption to python api
diff: @@ -455,6 +455,7 @@ PYBIND11_MODULE(_pyxacc, m) {
  boost::lexical_cast<std::string>(kv.second));
  },
  "Set a number of options at once.");
  + m.def("unsetOption", &xacc::unsetOption, "");
  m.def("getOption",
  (const std::string (*)(const std::string &)) & xacc::getOption,
  "Get an XACC framework option.");
  