added multiplication ability
Merge branch 'master' of https://github.com/Wuzseen/Circuit-Math
Added basic varying difficulty levels (Just easy and Medium for now)
Added the basics for the 'Timed' mode. There are no GUI elements yet for the time left, the number of correct answers you've completed, or for when the game is over. The GameOver() function is also mostly blank, and just prints 'Game Over' to the console