Changes of Sylpheed

* 1.9.0 (development)

    * This is the first release of GTK2 development version.
    * From GTK2 feature:
      - Multilingualization (m17n) has been supported.
      - Anti-aliased font has been supported.
      - Many glitches related to font management have been solved.
      - The user-interface has been improved in many respects.
    * Gpgme-1.0 has been supported.
      - A warning is displayed if a key for encryption is untrusted.
      - The status of signature validity became more descriptive.
      - Signatures inside nested multipart are now recognized.