GitHub push 3-16-14

[Additions]
- Added row color changing
- Changed how row speed is created and stored
- Changed how rows are generated
- Added several new ball textures including fun ones
- Added a caution symbol texture and created a new pause texture
- Game increases difficulty (color of rows) by score
- Rows speed up over time
- Increased side borders length to allow better hit detection
- Increased balls size
- Increased the gravity applied on the ball (-9.81 -> -16), ball drops
quicker
- Added an animation for the caution symbol
- Started implementation of caution/camera orientation flipping (need
to make mirror work). Possibly by splitting the base class up will help
this problem.