Pyqrcodeng

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* Improved documentation
* Internal code refactoring
* Performance improvements

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* Initial release of PyQRCode NG (PyQRCode Next Generation)

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* Added support for meCards etc. contributed by Riccardo Metere
Fixed <https://github.com/mnooner256/pyqrcode/pull/45>
* Skip detecting content type if constructor mode is given to constructor.
Contributed by Martijn van Rheenen.
Fixed <https://github.com/mnooner256/pyqrcode/issues/50>
* Moved tests from nose to pytest since nose is deprecated,
see <https://github.com/heuer/pyqrcode/issues/2>
* Updated test environment: Added PyPy, PyPy3 and Python 3.6
* QRCode.get_png_size() is deprecated, use QRCode.symbol_size(). The latter
returns a (width, height) tuple, not an integer.
* Deprecated QRCode.png_as_base64_str(), use QRCode.png_data_uri() which returns
a valid URI instead of a Base64 encoded string
* Faster PNG generation, fixed <https://github.com/mnooner256/pyqrcode/pull/47>
* Added CLI
Fixed 4 and <https://github.com/mnooner256/pyqrcode/pull/53>
* Added term() method to QRCode which prints the QR Code to the terminal.
This works with Windows and Unix.
* Deprecated QRCode.terminal() in favor of QRCode.term()
* Added "scale" parameter to QRCode.text

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* Fixed issue 43. A debug print statement got left in by mistake. I altered
The distribution script to check and make sure it does not happen again.

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* Added Kanji support.
* Added ability to output PNG QR codes as a base64 string. Allows coded to be
created for web services without the need to create intermediary files.
Thanks to [Fábio C. Barrionuevo da Luz (luzfcb)](https://github.com/luzfcb)
* Added renderer for XBM. Displaying QR codes in Tkinter is now extremely
simple. Thanks to [Seth VanHeulen (svanheulen)](https://github.com/svanheulen)

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* Fix for issue 38, where numeric encodings got broken by added unicode support.