RPC method is also accessible from browser url

**Enhancement**

* Enabled HTTP-GET request for accessing rpc method.

* ```__init__.py```  -->  Added url for calling rpc method directly from browser , which asks for downloading the json-rpc file which has the resources and its metadata. To check this type url in browser as 
**http://127.0.0.1:8000/json/resources**
Anyone can make use of it by processing this json file in their respective code mdel

* ```rpc_resources.py```  --> resources() method is also marked as 'safe' in method decorator.