WASHINGTON(Reuters)-HomeresalesroseinAugusttotheirhighestrateinmorethantwoyearsandgroundbreakingonnewhomesalsoclimbed,signsthatabuddinghousingmarketrecoveryisgainingtraction.TheNationalAssociationofRealtorssaidonWednesdaythatexistinghomesalesincreased7.8percentlastmonthtoanannualrateof4.82millionunits.Thatwaswellaboveeconomists'expectationsandthefastestratesinceMay2010whenactiv...