Added Coins, Fixed Pipes, Added Collision to Question Boxes and Coins etc...

- Fixed code for Green Pipe Animation inside loadlevel function
- Implemented Pipe Extensions Animation and height adjustement through
loadLevel
- Implement Coin animation
- Implement Loadlevel to handle coins, and rows or coins
- Implement Collision detection on QuestionBoxes
- Implemented QuestionsBoxes to change to static looking box after being
hit
- Implemented code for future powerups (random number to determine if
box will have powerup if hit underneath)   ***THIS IS TURNED OFF UNTIL
FINAL ITERATION - FLAG to turn on is this.canHavePowerUps = false
- Implemented Coin collision detection. Stub created for increment
points in game engine
- Removed images not being used any longer