Update visualize-git to latest version

Michelle Tilley · Michelle Tilley · commit f4ab85b86b2d · 2016-06-16T10:06:22.000-04:00
diff --git a/visualize-git b/visualize-git
@@ -1 +1 @@
-Subproject commit f54fe18711b1bf39a0de6cb27476aaef3e7ba18d
+Subproject commit 2f84cce800760eea6971c77913f6b40e72f60f4c
