Update DESCRIPTION

added myself as a contributor, as requested

DESCRIPTION

@@ -5,7 +5,8 @@ Version: 0.2.0
 Date: 2018-03-19
 Authors@R: c(
     person("Bob", "Rudis", email = "bob@rud.is", role = c("aut", "cre"),
-    comment = c(ORCID = "0000-0001-5670-2640"))
+    comment = c(ORCID = "0000-0001-5670-2640")),
+    person("Zachary, "Kurtz", email="zdkurtz@gmail.com", role = "ctb")
   )
 Maintainer: Bob Rudis <bob@rud.is>
 Encoding: UTF-8