One of the city's top casinos is getting a $30 million makeover.  Harrah's is redoing 450 rooms and suites in the Bayview Tower,  The work will begin in mid-November and is to be finished by memorial day weekend 2017.  It is part of a race among Atlantic City's most successful casinos to remain competitive by reinvesting in their properties.  Parent company Caesars Entertainment is spending $200 million on projects at Harrah's, including the recently opened Waterfront Conference Center, and planned improvements to the Pool After Dark, its fitness center and food court.