Add CoinFlip from the exercises
Improve by passing boolean directly
Remove flipCoin method in favor of ternary
Add DartBoard from the book
Fix DartBoard to use random doubles between -1.0 and 1.0
Add RadioactiveDecay simulator from exercises
Capitalize constants
Ugly solution to MathQuiz exericise
Attempt to clean up solution
Add giveKudos method
Start implementing Card
Add toString method