Fixes on issue 634 #800

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Commits on Aug 24, 2011
  1. fixes on issue 634

    manuargue committed Aug 24, 2011
    * now the privacy widget is subscribed to some signals in order to
    update the lists when a contact is modified outside this widget.
    
    * added a few methods in the papylib session to search the contacts
    with a determined set of flags (block/unblock/reverse/forward).
    Thus, the methods added to the base.ContactManager class in the
    last commit, have been deleted (are no longer required).