Handle model response with multiple nested keys.

[ankit-agrawal11]

Originally reported by: Shishir Anshuman (Bitbucket: shishiranshuman13, GitHub: shishiranshuman13)

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Add functionality to save the nested object of model type in the redux-store.

Hint: Create a function marshalResource() which accepts two parameters: jsonObject and resourceName, and save the data of the object in the store with key : resourceName.

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• Bitbucket: https://bitbucket.org/causecode/react-hero/issue/3