Update picard to 0.16.

Update picard to 0.16.

while here,
* convert some needless buildlink3 to simple DEPENDS.
* distutils pkg, register egg-info.

Version 0.16 - 2011-10-23
 * Added AcoustID support.
 * Fixed track metadata plugins.
 * Added new internal %_totalalbumtracks% tag field. (PICARD-16)
 * Track metadata plugins now run also on non-album tracks. (PICARD-7)
 * Fixed custom Various Artists name on the %albumartist% field. (PICARD-5)
 * Album artist is now correctly "translated". (PICARD-1)
 * Unicode punctuation is now converted to ASCII by default.
 * WavPack correction files are moved together with the main files. (PICARD-15)
 * Unicode filename normalization on OS X.
 * Original release date is now saved into %originaldate%.
 * Allow tagging with localized artist aliases (PICARD-17)
 * Added a quit confirmation dialog. (PICARD-46)
 * Standalone recordings can be tagged with relationships now. (PICARD-10)
 * Refreshing an album will refresh its "other versions" listing. (PICARD-8)
 * "Unicode punctuation to ASCII" now works on album-level metadata. (PICARD-50)
 * DJ-mix tags should only be written to the medium where they apply. (PICARD-20)
 * Support URL redirects in web service/network request module (PICARD-54)
 * Jamendo and Archive.org cover art is displayed on web page, but not loaded by Picard plugin (PICARD-52)
 * Edits to metadata in "Details..." menu not reflected in UI (PICARD-13)
 * The status bar/new metadata box is updated when a selected file/track is changed. (PICARD-14)