Updating Stan to tagged v2.17.0

seantalts · seantalts · commit 7e26bcac685b · 2017-09-05T23:02:39.000-04:00
diff --git a/stan b/stan
@@ -1 +1 @@
-Subproject commit db44338269ad716e533c455ec8924b5092f5ec40
+Subproject commit 52d23a6f8365df67b5402c975bf4299c20f0966a
