Changed hardcode student array to load from plist file.
Updated refresh method to reload students array from plist
Changed a property name
Created Data Model object for reading from a plist, archiving it with an NSKeyedArchiver, and reading that data into arrays. Factored out UITableViewDataSource which, since the main view controller was a UITableViewController created in Storyboard, required setting the datasource in Storyboard.
Added function to sort TableView students section in Alphabetical order
Merge pull request #1 from jschwab923/Class-Roster-Day2

Class roster day2