added Core Data and something.

Core Data,
Alert View,
History
Added history function and something.

Added history function.
Navigation button,
Setting view.
Merge branch 'CoreData'
Merge branch 'master' into CoreData
Merge branch 'CoreData'
Merge branch 'master' into CoreData
Merge branch 'CoreData'
Merge branch 'master' into CoreData
Merge branch 'CoreData'