astelco: fix park property (READY_STATE) and park setter (READY)

    def park(self):

        """

        bool or None: The parked state of the telescope.

        Checks Bit 6 of TELESCOPE.MOTION_STATE.

        """

        res = self.get("TELESCOPE.MOTION_STATE")

        res = self.get("TELESCOPE.READY_STATE")

        if self.error:

            return None

        try:

            return bool(int(res) & (1 << 6))

            # return bool(int(res) & (1 << 6))

            return False if int(res) else True

        except (TypeError, ValueError):

            # ValueError for "FAILED 2"

            return None

    @park.setter

    def park(self, b):

    def park(self, b, timeout=90):

        """

        Parks or unparks the telescope.

            - ``False`` to move it to its startup (unparked) position.

        """

        park_val = 1 if b else 0

        self.put("TELESCOPE.PARK", park_val)

        park_val = 0 if b else 1

        self.put("TELESCOPE.READY", park_val)

    @property

    def altaz(self):