Rewrote the program entirely

I've changed the way that the Computer does a move. It previously utilised random.randint and now instead relies on random.choice. The reasoning behind this choice was that I grew weary of refering back to the moves dictionary to figure out what the integer meant during any debugging efforts. Afterwards functions were created as needed to allow for a way to access the data needed to be able to return a suitable string based on what the outcome of the match was e.g. 'Rock crushes Scissors'.