NEWTON, Mass.--(BUSINESS WIRE)--Hospitality Properties Trust (NYSE:HPT) today announced its financial results for the quarter and six months ended June 30, 2015, compared to the results for the prior year comparable periods:               Three Months Ended June 30, Six Months Ended June 30, 2015 2014 2015 2014   ($ in thousands, except per share and RevPAR data)   Net income available for common shareholders $ 77,980 $ 48,749 $ 114,395 $ 81,133 Net income available for common shareholders per