R | 1h 37m | Comedy, Drama | March 27, 2015 The fairly fun “While We’re Young” is about the shifts in integrity and outlook between Generation-X and Generation-Y regarding filmmaking.  More specifically, it’s about the truthful documentary versus the faux, faked documentary. Here’s a generational difference: In trad (Boomer) rock-climbing of the 1960s and ’70s, the rules…