Added restart functionality including a UIAlertView Dialog when the current round is finished. Tested with iOS Simulator.
Updated GridModel to be more testable.

Made consistency helper functions public for testing. Created
a useGrid method for deterministic grid for testing.

Tested: iOS simulator
Created empy GridGenerator class.
GridModel now calls Grid Generator. Still needs to read input from file.
Added grid files.
Grid Generator completed.
Reads grids from provided file and initializes grid with them.
Required features for Assignment 7 completed, other than additional
juice.
Added Grid Generator Comments, and fixed the replacement of periods with 0s in the strings.
Merge pull request #4 from kateaplin/gridGenerator

Finished the Grid Generator feature