Moved dependency "flowchart" to bower and make it update-to-date

bower.json

@@ -32,6 +32,7 @@
     "viz.js": "~1.3.0",
     "js-yaml": "~3.5.2",
     "to-markdown": "~1.3.0",
-    "lz-string": "~1.4.4"
+    "lz-string": "~1.4.4",
+    "flowchart": "~1.6.1"
   }
 }