code: def install_versioning(self, conn):
          
          logging.info('Creating the versioning table %s', self.version_table)
          conn.executescript(CREATE_VERSIONING % self.version_table)
          self._insert_script(self.read_scripts()[0], conn)
docs: Create the version table into an already populated database
          and insert the base script.
  
          :param conn: a DB API 2 connection