Log Message:
Update to 2.0.1

Changes:

    * The sorting of summary now fall backs to comparison by date.
    * The folder tree is now expanded/collapsed by double click.
    * localedir, manualdir, and faqdir became user-configurable on configure.
    * A bug that multiple selection of the addressbook with Control key
      didn't work with GTK+ 2.6.9 was fixed.