Update lodash to 4.x

Author: Nick Litwin

package.json

@@ -60,7 +60,7 @@
     "font-awesome": "^4.5.0",
     "intro.js": "^1.1.1",
     "jstimezonedetect": "^1.0.6",
-    "lodash": "^3.10.1",
+    "lodash": "^4.5.0",
     "moment": "^2.11.1",
     "moment-timezone": "^0.5.0",
     "ng-dialog": "^0.5.6",