Mutagen

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* Tests:

* Require `hypothesis <https://hypothesis.readthedocs.io>`__
* Run pycodestyle/pyflakes tests by default. Skip with ``--no-quality`` or
``-m no quality`` when using pytest directly.

* Python 3.3 is no longer supported
* MP3: Improved bitrate accuracy for files with XING header :bug:`328`
(thanks :user:`Michaël Defferrard <mdeff>`)
* ASF: Fix case where some tags resulted in broken ASFUnicodeAttribute
instances :bug:`324`
* Add support for filesystems which don't support opening files read/write
(gvfs over fuse for example) :bug:`300`
* mid3v2: Add support for USLT :bug:`306`
* Minor improvements by :user:`Borewit` and
:user:`Evan Purkhiser <EvanPurkhiser>`

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* Note: New release tarballs are now hosted on github:
https://github.com/quodlibet/mutagen/releases
* ID3:

* Add iTunes grouping frame `id3.GRP1` :bug:`304`
* Fix exposing text frames where the text can't be encoded with the
reported encoding due to merging of frames :bug:`307`

* OGG: Fix wrong StreamInfo.length (small negative value) for all
ogg based formats in rare cases. :bug:`308`

-----------------

* Relicense "GPLv2" → "GPLv2 or later" :bug:`291`
* DSF: add `mutagen.dsf` module for DSF (DSD Stream File) support
:pr:`283` (Boris Pruessmann)
* MP3: Add `mp3.MPEGInfo.encoder_settings` containing a guess of the encoder
settings used, for example ``"-V2"`` for LAME :bug:`66`
* ID3: add iTunes movement related frames `id3.MVIN` and `id3.MVNM`
* MP4: support ``©mvi``, ``©mvc``, ``shwm``, ``stik``, ``rtng``, ``tves``,
``tvsn``, ``plID``, ``cnID``, ``geID``, ``atID``, ``sfID``, ``cmID``,
``akID`` :bug:`130`

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* MP3: fix error with xing frames without a frame count :bug:`292`

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* ID3: Always write little endian utf-16 with BOM.
Fixes tests on big endian machines :pr:`289`

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* Support GAE runtime :bug:`286`
* FLAC: Fix crash when loading files with zero samples :bug:`287`
* MP3: Handle broken lame tags written by older lame versions