Mutagen

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* ID3: Ignore trailing empty values for v2.3 text frames :bug:`276`
* ID3: Write large APIC frames last :bug:`278`
* EasyID3: support saving as v2.3 :bug:`188`
* FLAC: Add StreamInfo.bitrate :bug:`279`
* mid3cp: Add ``--merge`` option :bug:`277`
* MP4: Allow loading files without audio tracks :bug:`272`

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* Revert back to distutils :bug:`273`

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* Tests: Require pytest
* Tools: Install .exe launchers on Windows
* setup.py: Require setuptools
* ID3:

* Fix loading files with CRM frames :bug:`239`
* Fix loading AENC, LINK, GRID frames with no payload
* Merge duplicate text frames with same key on load :bug:`172`
* Allow parsing of duplicate APIC frames :bug:`172`
* Parse utf-16 text fields with missing BOM :bug:`267`
* Increase max resyncs for the mpeg frame search :bug:`268`

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* ID3: Expose some internals again to make Picard (mostly) work again.

* http://tickets.musicbrainz.org/browse/PICARD-833
* https://github.com/metabrainz/picard/pull/479

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* ID3:

* Add `CTOC <id3.CTOC>` and `CHAP <id3.CHAP>` frames. New classes:
`ID3Tags <id3.ID3Tags>`, `CTOCFlags <id3.CTOCFlags>`. :bug:`6`
* Add `TCAT <id3.TCAT>`, `TKWD <id3.TKWD>`, `PCST <id3.PCST>` frames.
:bug:`249`
* Validate user provided LNK/LINK frameid. :bug:`242`
* Add `RVAD <id3.RVAD>`, RVA frames
* Add TST, TSA, TS2, TSP and TSC frames
* Fix not writing optional fields when saving to v2.3
* Add default field values for all frames

* Drop Python 2.6 support
* EasyID3: Fix TXXX frame encoding when setting a non-latin1 encodable
value after a latin1 one. :bug:`263`

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* Fix loading of small ogg/apev2 files (1.33 regression)