The waterfront South Florida mansion gangster Al Capone bought as a family retreat in 1928 is being restored to its Prohibition-era opulence and beginning what the property’s new managers said Wednesday is a new chapter as a sun-splashed site for video and photo shoots.The site is actually a collection of three houses: a gate house, a main villa and a cabana overlooking a large pool on one side and Biscayne Bay on the other. Marco Bruzzi, co-founder and chief executive officer of the MB America property investment company, said the purchase price was more than $8 million, with an additional $1.75 million in renovations ongoing.