Enhancements to UIData components

[jcunca]

This is my first time in the forum, but I use primefaces for some time and would like to propose the following enhancements to UIData components:

- As UIData components are becoming some kind of input components (selection), I think it makes sense to leverage the JSF infrastructure and add a converter property to org.primefaces.component.api.UIData (replaces the SelectableDataModel class);

- Add a new paginator / dataScroller component similar to the following ones:
http://docs.jboss.org/richfaces/4.1.X/4 ... taScroller
http://myfaces.apache.org/tomahawk-proj ... oller.html

- Remove the rowCount property from the LazyDataModel class. The getRowCount() method should be held abstract and the index property should range from 0 to getRowCount() - 1.

Thanks in advance,
José Cunca