UISearchDisplayController


 * http://stackoverflow.com/questions/2813118/prevent-a-uisearchdisplaycontroller-from-hiding-the-navigation-bar
 * http://stackoverflow.com/questions/2639722/uisearchdisplaycontroller-changing-row-height


 * http://www.iphonesdkarticles.com/2009/01/uitableview-searching-table-view.html