Function less_than_equal

include/chaiscript/dispatchkit/operators.hpp:126–129

      template<typename T>
        void less_than_equal(Module& m)
        {
          m.add(chaiscript::fun([](const T &lhs, const T &rhs){return lhs<=rhs;}), "<=");
        }

      template<typename T>
        void logical_compliment(Module& m)