Made some reorganization

- Made timer.pde and put all time related functions there
- Put the next() to threadControl
- Also added background music for the intro
Added keyPressed for threads
Fixed the lost page a little bit and added type sound
Added Pong

-Also fixed some indexOutOfBounds for the keyPressed
-Also made a template for the threads
Added games PONG, SMASH, STACK and a TIME thread
Fixed the timer, the threads and Circle
Changed intro to be a little louder?
Fixed end game and highscore saving
Added Messages for the game ended screen