added board under TicTacToe namespace and updated tests
Added Computer under TicTacToe namespace, updating tests
First test checking GuiDisplay inherits correctly
test checking if is greeting the players
added initial constructor and executable
Refactored the constructor by extracting into smaller methods
Updated game type test to check for correct label text
centered greeting message
updated window title
renamed local variables
added label asking for game type
Added reset method to the Board
updated tests and code in Game class for 100% coverage
Removed unnecessary data from tests