add authors.txt

authors.txt

+!!!  HIGH ORDER IN SPACE AND TIME DEFERRED CORRECTION (EXPLICIT) 
+!!!     RESIDUAL DISTRIBUTION METHOD 
+!!!  DESIGNED FOR THE SYSTEM GIVEN BY THE EULER EQUATIONS in 1D and 2D
+!!!
+!!!  Authors:
+!!!  Remi Abgrall (University of Zurich),
+!!!  Paola Bacigaluppi (University of Zurich),
+!!!  Svetlana Tokareva (University of Zurich)
+!!!  Institute of Mathematics and Institute of Computational Sciences
+!!!  University of Zurich
+!!!  July 10, 2018
+!!!  Correspondance:	remi.abgrall@math.uzh.ch
+!!!  ------------------------------------------