Added skeleton for game logic. Dice holds array.
added calls to win/loose methods
Added background image to main window
Dice contains an array of Die. Added DiceArray

DiceArray hold the dice as an array with the number of sides.
One rng for the set.
Dice holds dice as an array of Die.
Each Die has its own rng.
Merge branch 'Lab5-gameLogic' of https://github.com/ajenshireman/CSIT2220 into Lab5-gameLogic
forgot to save the .csproj