Added core data entities.
Generated core data entity classes.
Added Core Data configuration declaration to RTAppDelegate.h.
Imported CoreData.h by default for every source file.
Removed core data configs in RTAppDelegate in case of potential exceptions.
Added inverses between data models.
Added CoreData framework.
Implemented RTAppDelegate for CoreData. (Database name: RealTrack.sqlite)
Added back import CoreData.
Removed dealloc method in RTAppDelegate.
Changed Enter Data view to TableView.
Changed Pending and Activities view controllers to UITableViewController.
Linked views to view controllers for activities and pending.
Added code in table view controllers for using CoreData.
Added identifiers to enterData, activities, and pending view controllers.
Linked enterData, activities, and pending view controllers to CoreData.
Merge pull request #1 from ChenheliHua/datamodel

Datamodel