Photo: Sinna Nasseri Before she even walked onstage, Aya Cash swore she was going to cry during Vulture Festival ’s ten-year-anniversary reunion panel for You’re the Worst . She kept that promise — so did her two co-stars, Kether Donohue and Desmin Borges. Borges became so emotional while discussing his experience playing Edgar, an Iraq War veteran with PTSD, that he had to ask for Kleenex and a beer to be brought to the stage. (Chris Geere, a.k.a. insufferable novelist Jimmy Shive-Overly, was