Made _gridLength and _countToWin public for AI
Suppress warning
Created Smart AI based on Medium AI

Created Smart AI. It checks to see if there’s a possible win, if there
is it places it at that winning position. Else, it will default to
medium AI.

I can’t beat it, I really can’t. There’s just one bug regarding ties.
Fix for tie and board filled

For some reason _moveCount was going to 25 very early, not sure why.
Back to the old way of checking.

Fixed issue where if the board is filled and someone wins, it will show
a dialog saying it’s a tie
Merge pull request #30 from aaron7pm/smart-ai

Smart AI