Dice and D6 done
Changed Dice interface to the roll-mechanic, and reflected that change in D6 implementation
Added testlist.txt
DiceRoller and SuccessCriteria
Added SuccessCriteria interface
Added DiceRoller interface, but not done yet
DiceRoller and SuccessCriteria done
Finished DiceRoller and SuccessCriteria interfaces