refactored the getMove function. separated out get_startPos, which defines startRow and startCol through prompting(only be used for console gaming), and isValid_startPos, which takes in an input and checks if that input(starting piece) is valid or not. Also changed some of the wording on the alerts. in console_driver I added play which takes into account 'play' and 'exit' and continues the game based on the answer.