Implemented CCEasePolynomial Action.

- Developed a replacement for exponential mathematical routine with a nth order polynomial which resembles an exponential curve for values of 0 <= t <= 1 and an order of 6.
- Advantage of using polynomial curves is that they do not asymptote.
- Developers can control the acceleration at which it eases in or out by adjusting the polynomial value, polynomial must be greater than 1.
- Allowed for odd and even values of polynomial orders as odd values will exhibit an inflection in the curve.

The attached image shows the timing curves for the following:
- Purple = Ease In Polynomial order 3
- Green = Ease In Polynomial order 9
- Blue   = Ease In Polynomial order 6
- Red    = Ease In Exponential

![ccactionease](https://f.cloud.github.com/assets/1904325/468729/e49953c2-b69e-11e2-8f17-21dcfedb8066.png)