beets-alternatives: 0.8.2 -> 0.9.0

This introduces the following upstream changes:

  * The package is now on PyPI
  * Require at least beets v1.4.7
  * Update album art in alternatives when it changes
  * Python 3 support (Python 2.7 continues to be supported)
  * Support the format aliases defined by the convert plugin ('wma' and
    'vorbis' with current beets)
  * Bugfix: Explicitly write tags after encoding instead of relying on
            the encoder to do so
  * Bugfix: If the formats config option is modified, don't move files
            if the extension would change, but re-encode

I updated this because I was pinged by @wisp3rwind about moving back to
@geigerzaehler's repository at [1].

This is what @wisp3rwind wrote in the comment[2] (which was originally
directed to @Profpatsch):

  (I hope you're the one to bug, or at least can ping someone else), I
  just noticed that you switched the NixOS package to my repository.
  Would you please switch it back to this repo soon-ish? The code here
  is better tested, and [3] is handled less elegantly on my fork since
  it requires changes to the configuration. The latter are undocumented,
  but whoever has bothered to take a look at the code might end up with
  (harmless) unused config entries.

So in essence we're now back to the original upstream repository again,
which I changed to @wisp3rwind's fork in 29e89248bfe74ca8d9d539c7ae441f
because it fixed issues with Python 3.

Stripping the long_description from setup.py also doesn't seem to be
required anymore, but I didn't investigate why (might be because either
our Python tooling now sets a default language or the README simply no
longer has non-ASCII characters).

[1]: https://github.com/geigerzaehler/beets-alternatives
[2]: https://github.com/geigerzaehler/beets-alternatives/issues/23
[3]: https://github.com/geigerzaehler/beets-alternatives/pull/27

Signed-off-by: aszlig <aszlig@nix.build>

pkgs/tools/audio/beets/alternatives-plugin.nix

@@ -2,20 +2,16 @@
 
 pythonPackages.buildPythonApplication rec {
   name = "beets-alternatives-${version}";
-  version = "0.8.2";
+  version = "0.9.0";
 
   src = fetchFromGitHub {
     repo = "beets-alternatives";
-    owner = "wisp3rwind";
+    owner = "geigerzaehler";
     # This is 0.8.2 with fixes against Beets 1.4.6 and Python 3 compatibility.
-    rev = "331eb406786a2d4dc3dd721a534225b087474b1e";
-    sha256 = "1avds2x5sp72c89l1j52pszprm85g9sm750jh1dhnyvgcbk91cb5";
+    rev = "v${version}";
+    sha256 = "19160gwg5j6asy8mc21g2kf87mx4zs9x2gbk8q4r6330z4kpl5pm";
   };
 
-  postPatch = ''
-    sed -i -e '/long_description/d' setup.py
-  '';
-
   nativeBuildInputs = [ beets pythonPackages.nose ];
 
   checkPhase = "nosetests";