add HG as author

Author: HelenaLC

DESCRIPTION

@@ -12,6 +12,10 @@ Authors@R: c(
 	    role=c("aut", "cre"),
 	    email="helena@crowell.eu", 
 	    comment=c(ORCID="0000-0002-4801-1767")),
+    person("Hugo", "Gruson",
+        role=c("aut"),
+        email="charlotte.soneson@fmi.ch",
+        comment=c(ORCID="0000-0002-4094-1476")),
     person("Vince", "Carey",
         role=c("aut"),
         email="stvjc@channing.harvard.edu",