CSS Fixes to Remove Dynamic Styling and <h2> tags

Please review this change for updating the styling of the jquery_pivot object. A summary of the reasons for the changes is below:

* I had issues specifically with the <h2> headers as my application does not support this type of styling. 
* The updates to the dynamic styling in the <div> tag was so I can create more flexible styling for this UI object.

I hope you find these useful. If you think any further changes should be made before submitting this, just let me know.