Preface: 19th European Conference on Applications of Evolutionary Computation - Squillero, Giovanni; Bacardit, Jaume; Cagnoni, Stefano; Falco, Ivanoe De; Divina, Federico; Esparcia-Alcázar, Anna I.; Glette, Kyrre; Hidalgo, J. Ignacio; Kampouridis, Michael; Mavrovouniotis, Michalis; Nguyen, Trung Thanh; Sim, Kevin; et al. (My University, 2016)