Daily summaries of TV networks to LBJ; Bureau Chiefs set up TV control room at White House; Bill Moyers and Peter Benchley leaving the White House; Jack Valenti; monitored 11:00 to 1:00pm TV news shows for LBJ; LBJ believed Texans were resented; three networks installed TVs in the Oval Office; George Christian replaced Bill Moyers; Merriman Smith, UPI Senior correspondent; left White House for ABC Bureau with Hagerty in Washington