Saved url loader in filebrowser

examples/filebrowser/package.json

@@ -14,7 +14,8 @@
     "phosphor-dockpanel": "^0.9.7",
     "phosphor-keymap": "^0.8.0",
     "phosphor-menus": "^1.0.0-rc.1",
-    "phosphor-splitpanel": "^1.0.0-rc.1"
+    "phosphor-splitpanel": "^1.0.0-rc.1",
+    "url-loader": "^0.5.7"
   },
   "devDependencies": {
     "css-loader": "^0.23.1",