Log Message:
Update to 1.31:

1.31 - 2015.09.10
-----------------

* New padding control API for flac/id3/mp4/asf/ogg/aiff and everything
  based on it, except oggflac :bug:`229`
* Mutagen will now reduce padding on save if there is lots of it.
* delete() will remove padding in addition to tags.

* ASF:

  * Padding support :bug:`201`
  * Don't report negative lengths for some broken files
  * New :class:`asf.ASFInfo`.codec_type/codec_name/codec_description
  * Implement ASF.delete()

* OGG: Padding support for Opus/Vorbis/Theora/Speex
* M4A: Implementation removed. Every operation will raise. Use mp4 instead.
* Tools: Support Unicode output under Windows :bug:`232`

1.30 - 2015.08.22
-----------------

* FLAC:

  * Fix :meth:`flac.FLAC.save` in case the source contained a too large
    (invalid but recovered) image block :bug:`226`

* MP3:

  * Improved length and bitrate accuracy:

    * Read lame "Info" tags for improved bitrate/length accuracy
    * Use bytes info of VBRI headers for improved bitrate accuracy
    * Subtract encoder delay/padding from length for improved length accuracy
      (especially for short tracks)
    * Fix rare false identification of Xing headers :bug:`182`

  * New :class:`mp3.MPEGInfo`.encoder_info attribute containing the encoder
    name and version :bug:`66`
  * New :class:`mp3.MPEGInfo`.bitrate_mode attribute exposing if the file is
    VBR, ABR or CBR :bug:`24` :bug:`66`
  * New :class:`mp3.MPEGInfo`.channels attribute providing the channel count
  * New :class:`mp3.MPEGInfo`.track_gain/track_peak/album_gain values exposing
    the replaygain info provided by the lame header :bug:`36`

* ID3:

  * New :class:`id3.PictureType` enum for the picture type used in APIC frames \ 
:bug:`222`

* MP4:

  * Fix MP4FreeForm.__eq__ and MP4Cover.__eq__ when comparing with bytes
    :bug:`218`

* Don't raise on :meth:`FileType.save` if there are no tags. :bug:`227`
* Minor fixes: :bug:`228`

1.29 - 2015.05.09
-----------------

* mid3v2: Fix an error under Python 3 with files without tags :bug:`219`
* mid3v2: Various Windows+Python2+Unicode fixes :bug:`214`
* Don't emit warnings during loading (ID3Warning) :bug:`223`
* py.test support

1.28 - 2015.03.06
-----------------

* Various minor fixes to make mutagen behave the same under Python3 as under
  Python2.
* Update gpl text :bug:`205`
* Documentation: Add example for how to create a new flac.Picture :bug:`209`

* ID3:

  * Various error handling fixes (:bug:`110`, :bug:`211`, ...)
  * Don't hide ID3 loading errors with ID3FileType.
  * In case a synch safe marked frame isn't sync safe, only warn :bug:`210`
  * Removed PEDANTIC mode

* Tools:

  * Add signal handling :bug:`170`
  * mid3cp: Make it work under Windows.
  * mutagen-inspect: Make it work under Windows+Python3 :bug:`216`
  * Support unicode file paths under Windows+Python2 :bug:`214`
  * Support file paths with invalid encoding under Unix+Python3.