Set up header file for gridModel class
First level of abstraction created
Works for the most part; isConsistent still not done.
commit to try to solve git issues
Still testing Git
IsConsistent implemented not tested.
Created NumPadView, which works with limited functionality.
Added target/action functionality so that the ViewController can tell which cell was selected when a button is clicked.
THE GAME NOW WORKS EXCEPT GRID GENERATION AND NOT LOOKING UGLY AND ALSO START BUTTONS AND OTHER LESS IMPORTANT STUFF. MVP!!!
Fixed bug by changing the gridModel when the user inputs a number.
Merge pull request #1 from rachelsatx/gridModel_implement

Grid model implement