Gamera

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- Update install instructions to use pip

- ported from deprecated distutils to setuptools

- replaced old buffer protocol

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- fixed comparison operator for CCs (broke grouping algorithm)

- fixed endianness issue when writing GREY16 images

- fixed segfault with gcc 9.4.0 in color_ccs() (call to is_white())

- replaced py.test with pytest

- added empty tests/tmp directory so that unit tests work

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- ported to python 3.x

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- support for wxPython 4.x, while still compatible with wxPython < 4.0

- updated installation instructions for OS-X

- fix of Lab color conversion plugins

- fix of possible crash in resize (debian bug 874797)

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- support for gcc7 (thanks to VincentS)

- removed overflow of zernike_moments on 32bit systems

- zernike_moments now also implemented for greyscale image
(image is inverted so that dark objects get high weights)
As features do not support greyscale images, the plugin is
called "zernike_moments_plugin"

- new plugin hough_lines in category geometry

- handled errors in arguments of type PointVector more gracefully

- workaround for crash of progress bar on OSX with wxPython 3.0

- workaround for GetChildren in wxPython 3.0 returning deleted items

- icons in gamera_gui now immediately shown without resize
on OSX with wxpython 3.0

- photometric tag of TIFF files no longer ignored for onebit TIFFs,
which could lead to color inversion when reading TIFF images

- fixed error in reading/writing 16bit greyscale PNG images

- 16bit RGB PNG images now supported via downscaling
(fixes Debian bug 785548)

- reading of tiff images more error robust
(fixes Debian bug 784795)

- get() method corrected for Cc's with storage format RLE
(fixes Debian bug 763440)

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- updated zlib to version 1.2.8 (only used under Windows)

- fixed classifier crash on Windows

- fixed hang with wxpython 3.0 after quitting gamera_gui

- fixed crash in min_max_location for FLOAT images

- false_color now defaults to diverging colormap after Moreland, 2009