xraylib 3.1.0 revised September 2014 
Authors: A. Brunetti (Universita di Sassari, Italy),
	 M. S. del Rio (ESRF, Grenoble, France),
	 T. Schoonjans (Universita di Sassari, Italy),
	 T. Ikonen (EMBL, Hamburg, Germany),
	 B. Golosio (Universita di Sassari, Italy),
	 A. Simionovici (Universite Joseph Fourier, Grenoble, France),
	 A. Somogyi (ESRF, Grenoble, France),
	 M. Wormington (Jordan Valley Semiconductors, Austin, TX, USA),
	 D. Sagan (Cornell University, Ithaca, NY, USA)