Minor Bug Fix - State: Unstable

Fixed a bug where game would allow you to draw a card instead of pick
the pile when no valid move existed.

Fixed a bug where active player would not draw up to three after playing
a ten card.

Fixed a bug where validMoveExists() function was searching wrong card
container causing and error to be thrown.

Added cardVal() function to card object to instantly query card's
strength value (i.e. 2, 10, J, Q, A, etc).