code: def _read_htm_ids(self, mount_point):
          
          result = {}
          target_id = None
          for line in self._htm_lines(mount_point):
              target_id = target_id or self._target_id_from_htm(line)
          return target_id, result
docs: ! Function scans mbed.htm to get information about TargetID.
          @param mount_point mbed mount point (disk / drive letter)
          @return Function returns targetID, in case of failure returns None.
          @details Note: This function should be improved to scan variety of boards'
            mbed.htm files