Extracted a new class: NTDCoreDataTableViewController.

Refactored some common things of a UITableViewController which is based on CoreData into this class.
Extracted a new class: NTDCoreDataTableViewController.

Refactored some common things of a UITableViewController which is based on CoreData into this class.
Extracted more into NTDCoreDataTableViewController.
Minor change in NTDCoreDataTableViewController.h.
Corrected NTDCoreDataTableViewController to confirm NSFetchedResultsControllerDelegate Protocol.
Removed the potentially wrong assert for indexPath.section.
Using dot notation for NSIndexPath properties.
Merge branch 'master' of github.com:NicholasTD07/NTDCoreDataTableViewController