Relaxation dispersion citation for relax

The analysis of relaxation dispersion data is supported by the software relax. The primary citation is:

• Morin, S., Linnet, T. E., Lescanne, M., Schanda, P., Thompson, G. S., Tollinger, M., Teilum, K., Gagné, S., Marion, D., Griesinger, C., Blackledge, M., and d'Auvergne, E. J. (2014). relax: the analysis of biomolecular kinetics and thermodynamics using NMR relaxation dispersion data. Bioinformatics, 30(15), 2219-2220. (DOI: 10.1093/bioinformatics/btu166)