mark authorized when token and token secret are set
mark authorized when token and token secret are set

Change-Id: I36123e1eda8c64adbc02d2f1a6a90656404b3d7c
Reviewed-on: http://cr.qtquick.me/709
Reviewed-by: Tasuku Suzuki <42980d970444f9101663582e70cd53623b3238b4@gmail.com>
Tested-by: Tasuku Suzuki <42980d970444f9101663582e70cd53623b3238b4@gmail.com>

yuntan/twitter4qml,yuntan/twitter4qml