QtIFW

Implement dependee resolving for uninstallation.

Change-Id: I4a31ba04dc3672961984040ea6b741f96689d41c
Reviewed-on: http://codereview.qt.nokia.com/3198
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Niels Weber <niels.2.weber@nokia.com>
Reviewed-by: Tim Jenssen <tim.jenssen@nokia.com>