Restore game from file
Implement undo/redo in model
Modify View.moveStone to take info from model
unmoveStone
undo/redo one move at a time in model
Lots of changes.  Undo/redo functional.
Undo/redo menu options disabled when stack length < 2
Make long side horizontal
Modified printboard
Resume game adds separators to match record
Save/restore game works with undo/redo
Merge branch 'undo'

Conflicts:
	aboyne.wpr