Made Table View cells dynamic prototypes instead of static cells. Configured prototype cell.
Linked cell prototype text label to toDoItems array
Implemented tableView:didDeselectRowAtIndexPath:
It updates marks an item as completed when it is selected.
Added an accessory to the cells in the table that is toggled by the .completed status of a toDoItem
Removed static rows from main storyboard.
Minor edit to didSelectRowAtIndexPath