Ajout de la section 1.5

NEWS.txt

@@ -7,6 +7,11 @@ This file contains the main features as well as overviews of specific
 bug fixes (and other actions) for each version of ScalFMM since
 version 1.1
 
+
+1.5
+-----
+-
+
 1.4
 -----
 - Add interpolation FMM based on uniform grid points