richfaces-demo: add dataModel usage example in order to provide lazy paggination sample. ---------------------------------------------------------------------------------------- Key: RF-4928 URL: https://jira.jboss.org/jira/browse/RF-4928 Project: RichFaces Issue Type: Task Affects Versions: 3.3.0 Reporter: Ilya Shaikovsky Assignee: Ilya Shaikovsky -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira