Committing development stage function determineHand. Looks like it's
going to need to be re-worked, so I'm committing it in its current
state.
* Simplified winning hand definitions in pokerHandsAndDefinitions, and
* renamed the containing variable.
* Added and partially implemented scoreHand.
* Added and partially implemented Player.playHand().
* Added and implemented testHandAllSameSuit().
* Added and implemented Deck.shuffleCards().
* Swapped a .forEach with a for... in in Deck.buildDeck().
* Changed cardSuits from an Array of a one word suits to an Object of
* letters as keys and one word suits as properties, e.g. "H": "Hearts"
* Added variable cardRanks, which is just ranks and not values or suits.