High Energy Physics Forum for Computational Excellence: Working Group Reports (I. Applications Software II. Software Libraries and Tools III. Systems). - Salman Habib 002; Robert Roser; Tom LeCompte; Zach Marshall; Anders Borgland; Brett Viren; Peter Nugent; Makoto Asai; Lothar Bauerdick; Hal Finkel; Steven Gottlieb; Stefan Hoeche; et al. (CoRR, 2015)