The reviews are in for the online gambling thriller “Runner, Runner” and they aren’t very good.  In fact, to date, just 20 percent of critics at movie review aggregator site RottenTomatoes.com have given the film a thumb’s up.  Audience reviews were equally as harsh, though somewhat limited. Richie, a Princeton college student played by Justin Timberlake, travels to Costa Rica to confront the on-line mastermind, Ivan, whom he believes has swindled him out of monies wagered on his Web poker site. Ivan, played by Ben Affleck, sees a kindred spirit in Richie and brings the younger man into his operation….