Update conversion factors
Update conversion factors in accordance with CODATA 2014
https://journals.aps.org/rmp/abstract/10.1103/RevModPhys.88.035009
Edited by Simen Sommerfelt Reine
Update conversion factors in accordance with CODATA 2014
https://journals.aps.org/rmp/abstract/10.1103/RevModPhys.88.035009