Planck 2015 results IX. Diffuse component separation: CMB maps - Adam, R; Ade, PAR; Aghanim, N; Arnaud, M; Ashdown, M; Aumont, J; Baccigalupi, C; Banday, AJ; Barreiro, RB; Bartlett, JG; Bartolo, N; Basak, S; et al. (Astronomy and Astrophysics, 2016)