Add UISearchBar to FPViewController with instant friend search functiona...

...lity

Summary:
Included a UISearchBar to FPViewController following "Add Search to Friend Selector" HowTo from http://developers.facebook.com/docs/howtos/add-search-to-friend-picker-using-ios-sdk/. Implemented UISearchBarDelegate method, searchBar:textDidChange to search friends instantly when any text is typed.