Completed Styling of RibbonSplitButton

## Hover Over Toggle Button

![image](https://f.cloud.github.com/assets/574734/2472041/23bae88c-b030-11e3-872e-fb3d515da595.png)

## Hover Over Header button

![image](https://f.cloud.github.com/assets/574734/2472044/36784618-b030-11e3-846c-c453319a89ba.png)

## Press on Toggle Button

![image](https://f.cloud.github.com/assets/574734/2472047/492e176a-b030-11e3-9933-70b253faf217.png)

## Press on Header Button

![image](https://f.cloud.github.com/assets/574734/2472045/40ba581e-b030-11e3-97ed-8f1c237c78ac.png)

## Press on Toggle Button When Checked

![image](https://f.cloud.github.com/assets/574734/2472058/78625d98-b030-11e3-871e-c08405f45ea7.png)