Inaternationalized the Favorite TableVC tab and navigation items
Deleted FirstViewController.swift
Simply print out error messages - Error Handling is TODO
First unit test succeeded. Succeeded to get application delegate
Successfully get the Singleton managed object context
Test with CoreData. But failed with incompatible data store.
Successfully created managed object MobilePhone. Needs to clean up and save it.
Programmatically retrieval works. However, still not be automatically cast retrieved class to model class MobilePhone. Rather, a NSManagedObject is returned
Retrieved data from store with initial data turned off. However, still not be able to down cast managed object to MobilePhone class