More tests for ImageMath
flake8 ImageMath.py
Don't install mp_compile if multiprocessing.Pool() fails, or if 1 process is going to be used
More agressive make clean
Merge pull request #791 from wiredfool/multiprocessing_fail

Disable mp_compile when Multiprocess.Pool fails
Test ImageMath's mod, imagemath_equal and imagemath_notequal
Update CHANGES.rst [ci skip]
More tests for Image.py
Merge pull request #773 from hugovk/ImageMath

More tests for ImageMath.py
Updated Changes.rst [ci skip]
Added docs for previously-undocumented ExifTags module.
Reducing priority of exiftags docs
Removed autodoc for ExifTag
including ImageMorph autodoc
Autodoc formatting
Merge pull request #795 from wiredfool/exif_docs

More Docs [ci skip]
Updated Changes.rst [ci skip]
Merge remote-tracking branch 'upstream/master' into Image
Test Image's __ne__ and alpha_composite
Fix `ImageStat.mean` docs

The docs referred to `ImageStat.pixel`, which isn't a thing at all.

In addition, make it absolutely clear that all of the attributes return per-band data.