Card String Output

Card objects have their full rank and color printed out when calling the
str(). Old: 'rd2' New: 'red draw two'
Turn Text

The turn string has been changed from the turn number to who's turn it
is. Realigned the global message and current discard card.
Wild Fix, Reworked AI frequency

Fixed an issue with wild cards not giving the popup to select a color.
Changed how the AI function is called. Now is only called when it is the
computer's turn and is scheduled once rather than indefinitely. Added
some global messages.