Add Konstantin Tjuterev to the list of contributors.
diff --git a/AUTHORS b/AUTHORS
index 060f09f..0c406ba 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -11,5 +11,6 @@
 - Felipe Talavera
 - Guillaume-Jean Herbiet
 - Joseph A. Levin
+- Konstantin Tjuterev
 
 Portions derived from other open source works are clearly marked.