Working through kinks:
trying to work out if there are no cards in the deck
completed no cards error message
almost all functionality (different button if last card)
completed debugging, added results button

Also added case insensitive input for the answers and ensured that the response (correct/incorrect)
was functioning properly (I refactored it). I also realized that if you pass a
true/false from the url then you can't call "if true" but have to treat it as
a string as "if 'true'"
Merge pull request #6 from ztnark/Kevin

Kevin