Good news for former first lady Barbara Bush. She is being discharged  Houston's Methodist Hospital Saturday, according to a tweet from Bush family spokesperson Jim McGrath. Mrs. Bush,has been at the hospital since Monday for treatment of a respiratory illness.   According to the Huffington Post that Mrs. Bush's doctors made the decision earleir this morning.  McGrath says Barbara Bush responded well to medication and "she's great." Her release is coming at a great time too, two days before her 69th wedding anniversary.