The Stagger-grid: A grid of 3D stellar atmosphere models - I. Methods and general properties Z. Magic, R. Collet, M. Asplund, R. Trampedach, W. Hayek, A. Chiavassa, R. F. Stein and Å. Nordlund A&A, 557 (2013) A26 Published online: 15 August 2013 DOI: 10.1051/0004-6361/201321274