ResetRuntime File and getOriginalConfig

I have to work on node-config to support new functionality.
The complete work is to use it from webpage (thru backbone/backbone.io [Here](https://github.com/inaes-tic/backbone.io/commit/5523162c60aa326a3e7e4db0185a2c088a73048e))

So I need to rollback runtime changes #57 , and get Original Configuration.