HOUSTON — The U.S. saw a record number of exonerations in 2015, with nearly 40 percent of the cases involving individuals who were exonerated in homicides, a new report shows.The National Registry of Exonerations said in its report today that 149 people falsely convicted of crimes were exonerated last year. That’s 10 more than in 2014, the year with the previous highest total since the group began keeping records in 1989. The registry is a project of the University of Michigan Law School and has documented more than 1,730 …