- Removed done statement from last Kiwi message

  * The Done message at the last line was confusing, especially when
    KIWI exited with errors.
    To keep consistency and since the done message wasn't really needed
    because the last message is not a task it was also removed for
    the success messages.
Merge pull request #339 from thardeck/dont_show_done_if_exited_with_failed

- Removed done statement from last Kiwi message