Add Mark to AUTHORS.
diff --git a/AUTHORS b/AUTHORS
index b54d16b..9de970d 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -6,5 +6,6 @@
 - Jason L. Shiffer
 - Randy Merrill
 - Rick Osborne
+- Mark Derricutt
 
 Portions derived from other open source works are clearly marked.