* Implementation of "update on start" feature from spec https://wiki.ubuntu.com/SoftwareUpdates * Use a single main window that changes instead of having modal dialogs * Implement several special-purpose dialogs like "No updates" or "Dist upgrade needed" accordingn to the above spec * Split out release upgrader code and DistUpgrade module into a separate source package * Drop python-update-manager, as it is unused * debian/tests: - Add dep8 tests