Created Powerup class.
Added check in update loop to spawn power at random interval.
Implemented Powerup contact.
Merge branch 'bradmaster' into powerups
Merge fixes.
Implemented first Powerup type.
Implemented first bad Powerup, with separate timer.
Added points Powerups
Merge pull request #8 from ranleung/Pause

Pause
Fixed point update bug, squares not reseting bug, and points continuing to count on death bug
Merge pull request #9 from ranleung/bugFixes2

Fixed point update bug, squares not reseting bug, and points continuing ...
Created Timer class that shows on screen.
Fixed background stopped on game over bug
Merge pull request #10 from ranleung/bugFixes2

Fixed background stopped on game over bug
Created a swapPowerup function on Powerup.
Final fixes of swap Powerup.
Moved Powerup class file in file structure.
Merge branch 'bradmaster' into powerups
Master merge fixes.
Powerup scale crash fix.