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
Merge remote-tracking branch 'origin/Lab5-gameLogic' into Lab5-UI
forgot to save the .csproj
Merge remote-tracking branch 'origin/Lab5-gameLogic' into Lab5-UI