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Change log
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Version 4.0
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* Made qrcode work on Python 2.4 - Thanks tcely.
  Note: officially, qrcode only supports 2.5+.

* Support pure-python PNG generation (via pymaging) for Python 2.6+ -- thanks
  Adam Wisniewski!

* SVG image generation now supports alternate sizing (the default box size of
  10 == 1mm per rectangle).

* SVG path image generation allows cleaner SVG output by combining all QR rects
  into a single path. Thank you, Viktor Stískala.

* Added some extra simple SVG factories that fill the background white.

Version 4.0.1
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* Fix the pymaging backend not able to save the image to a buffer. Thanks ilj!


Version 3.1
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* Important fixes for incorrect matches of the alpha-numeric encoding mode.
  Previously, the pattern would match if a single line was alpha-numeric only
  (even if others wern't). Also, the two characters ``{`` and ``}`` had snuck
  in as valid characters. Thanks to Eran Tromer for the report and fix.

* Optimized chunking -- if the parts of the data stream can be encoded more
  efficiently, the data will be split into chunks of the most efficient modes.

Version 3.1.1
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* Update change log to contain version 3.1 changes. :P

* Give the ``qr`` script an ``--optimize`` argument to control the chunk
  optimization setting.


Version 3.0
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* Python 3 support.

* Add QRCode.get_matrix, an easy way to get the matrix array of a QR code
  including the border. Thanks Hugh Rawlinson.

* Add in a workaround so that Python 2.6 users can use SVG generation (they
  must install ``lxml``).

* Some initial tests! And tox support (``pip install tox``) for testing across
  Python platforms.


Version 2.7
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* Fix incorrect termination padding.


Version 2.6
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* Fix the first four columns incorrectly shifted by one. Thanks to Josep
  Gómez-Suay for the report and fix.

* Fix strings within 4 bits of the QR version limit being incorrectly
  terminated. Thanks to zhjie231 for the report.


Version 2.5
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* The PilImage wrapper is more transparent - you can use any methods or
  attributes available to the underlying PIL Image instance.

* Fixed the first column of the QR Code coming up empty! Thanks to BecoKo.

Version 2.5.1
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* Fix installation error on Windows.


Version 2.4
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* Use a pluggable backend system for generating images, thanks to Branko Čibej!
  Comes with PIL and SVG backends built in.

Version 2.4.1
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* Fix a packaging issue

Version 2.4.2
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* Added a ``show`` method to the PIL image wrapper so the ``run_example``
  function actually works.


Version 2.3
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* When adding data, auto-select the more efficient encoding methods for numbers
  and alphanumeric data (KANJI still not supported).

Version 2.3.1
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* Encode unicode to utf-8 bytestrings when adding data to a QRCode.


Version 2.2
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* Fixed tty output to work on both white and black backgrounds.

* Added `border` parameter to allow customizing of the number of boxes used to
  create the border of the QR code


Version 2.1
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* Added a ``qr`` script which can be used to output a qr code to the tty using
  background colors, or to a file via a pipe.
