Slot Machine functionality for the Dev Blog home page

This pull request creates a slot machine game that can be activated by clicking on the Evertrue logo in the header. There are six hand-made icons that get loaded into each reel, one of: a pair of cherries, an orange, a bar, a lemon, a diamond, or a 7. Complete with authentic slot machine sounds downloaded from royalty-free websites, this game is sure to appeal to all audiences! If you get three icons in a row the green Evertrue logo flips over into a specially-designed Evertrue coin, and the screen starts to fill with falling coins! It's almost like you're actually at the casino, and the money is almost as good as real money. Feel the thrill, the adventure, the mystery, and the wonder of the Evertrue Slots!