Add AUTHORS.txt file to conform to software catalog guidelines (#722)

Author: jamesgking

AUTHORS.txt

@@ -0,0 +1,29 @@
+Akiko Sato
+Aleksandr Ovcharenko
+Alessandro Cattabiani
+Alexander Dietz
+Alexandru Săvulescu
+Antonio Bellotta
+Baudouin Del Marmol
+Bruno Magalhaes
+Christos Kotsalos
+Fabien Delalondre
+Felix Schuermann (contributor)
+Fernando Pereira
+Francesco Cremonesi
+Ioannis Magkanaris
+James Gonzalo King
+Jeremy Fouriaux
+Jorge Blanco Alonso
+Kai Langen
+Michael Lee Hines
+Nicolas Cornu
+Olli Lupton
+Omar Awile
+Oren Amsalem
+Pramod Shivaji Kumbhar (maintainer)
+Sam Yates
+Sergio Rivas-Gomez
+Tapasweni Pathak
+Weina Ji
+viniciusdepadua