Fixed wrong mode of gif image.
In case of L mode and small image.
Pyroma installation is slow on Py3, so just do it for Py2
Link to CHANGES from README

And use absolute URLs for GitHub links so they work from PyPI.

[CI skip]
Remove 2,505-line changelog from description

It made the PyPI listing page very long and requires a lot of scrolling to get down to the files, annoying for downstream packagers.

Instead it's linked from the README. 

[CI skip]
Added test case for gif image (mode L): optimization turned on, but not needed.
Fixed test_optimize_full_l gif file test case.
Fixed test_optimize_full_l test case for python2.
Merge pull request #854 from hugovk/changelog

Link to 2,505-line changelog instead of showing it all on PyPI
Fix MANIFEST

include *.md
recursive-include Scripts *.sh
recursive-include Tests *.bw
recursive-include Tests *.cur
recursive-include Tests *.dcx
recursive-include Tests *.mpo
recursive-include Tests *.ras
recursive-include Tests *.rgb
recursive-include Tests *.sgi
Fix tga files with image ID field
Merge pull request #843 from uvNikita/gif_mode_fix

Fixed wrong mode of gif image.
J2k DOS fix --  CVE-2014-3598

Found and reported by Andrew Drake of dropbox.com
Bump Version/Changelog
Update CHANGES.rst
Merge pull request #850 from hugovk/pyroma

Pyroma installation is slow on Py3, so just do it for Py2
Use tempfile() instead of /tmp/
Update CHANGES.rst [CI skip]
Need 'temp_' or 'temp.' in filename
flake8 and tests
rename test