updating version of Showcase in README.md
RF-12765: Removed the nested tab from within the repeating components
RF-12964: Added push timeouts to the web.xml files
RF-12969: Implemented test assering a javascript error is not thrown when clicking on an active tab
RF-12969: Prevented the entire TabPanel from being rendered when the 0th tab is clicked.  Prevented a duplicate encoding of the active tab in partial requests.
RF-12846: Added the Accesskey interface, and changed the commandButton and commandLink to implement that interface
RF-13004: fixed ITResourceOptimization so that no javascript errors happen