Log Message:
Update sonata to 1.6.2.1.
In addition to PR#45023 by ISIHARA Takanori,
* LICENSE=gnu-gpl-v3
* register egg
* convert some buildlink to simple DEPENDS, because no contents to buildlink.
* drop dependency on py-elementtree, it's py24 way.
* honor PKGMANDIR.

v1.6.2.1 - September 21, 2009
        + Library artwork caching/displaying improvements
        + Lyricwiki screen scraping workaround
        + Replace Amazon.com cover art fetching with Rhapsody.com
        + Bug: Fix library sorting when adding, e.g., albums to playlist
        + Bug: Fix window positioning weirdness when unwithdrawing from systray
        + Bug: Fix album being labeled various artists when a duplicate exists
        + Bug: Fix album tracks in the info tab being out of order sometimes
        + Bug: Show songs with a missing date in info album listing
        + Bug: Library icons change after adding stream to playlist
        + Bug: Cpu spike, tooltips missing in library search results with gtk 2.16.2