Import opusfile-0.5 as audio/opusfile.

Opus is a totally open, royalty-free, highly versatile audio codec.
Opus is unmatched for interactive speech and music transmission
over the Internet, but also intended for storage and streaming
applications. It is standardized by the Internet Engineering Task
Force (IETF) as RFC 6716 which incorporated technology from Skype's
SILK codec and Xiph.Org's CELT codec.

This package contains a high level API for decoding and seeking in
opus files.
+ opusfile.
Added audio/opusfile version 0.5
describe opus option.
Update to 2.2.0:

Changes since 2.1.10:

* Several stability fixes, found with Valgrind and the Fedora retrace
  server
* Use GTK+ 3 by default, but still allow building against GTK+ 2
* Support extended tag fields in MP4 files
* Support GIF images in tags
* Abhinav Jangda’s Ogg Opus support, asynchronous image loading, scanner
  function tests and new Vorbis cover art support
* Santtu Lakkala’s MP4 cover art and GIO support, fix for Roman numeral
  capitalization
* Ask for confirmation before overwriting during renaming
* Ekaterina Gerasimova’s Mallard help updates
* Avoid truncating Vorbis audio data when saving
* Gianvito Cavasoli’s Italian translation update
* Alexandre Franke’s French translation updates and typo fix
* Wolfgang Stöggl’s German translation updates
* Piotr Drąg’s Polish translation updates
* Мирослав Николић’s Serbian translation update
* Daniel Mustieles’ Spanish translation updates
* Balázs Úr and Attila Hammer’s Hungarian translation updates
* Enrico Nicoletto and Rafael Ferrera’s Brazilian Portuguese translation
  updates
* Marek Černocký’s Czech translation updates
* Aurimas Černius’s Lithuanian translation update
Updated audio/easytag to 2.2.0