Refactor UIRepeat code to implement PSS algorithm like UIData and fix state behavior

Right now, the code in org.apache.myfaces.view.facelets.component.UIRepeat has not been reviewed more than to fix issues related to JSF 2 spec. It works, but it can be done better.

The code has the following opportunities:

• Implement PSS algorithm, to prevent store data in the state.
• The algorithm used in UIData to handle state is better.
• Fix MYFACES-3415