We modified this file to retain the app item settings and use it in a straightforward manner in templatebuilder.js for saving updates. Only values that are changed are updated, please see below. 
![capture](https://f.cloud.github.com/assets/2959186/2418866/648f9a2c-ab50-11e3-8ec5-dbd9bbc6b204.PNG)

About helperServices and variables such as proxyURL, these are actually coming from the configuration file (defaults.js). Should we delete it from here as we are not using them in the application?