Merge pull request #669 from wiredfool/tiff_compression

Use libtiff for writing any compressed tiff files
Update CHANGES.rst [ci-skip]
Test arc, chord, pieslice give TypeError when bounding box is [(x0, y0), (x1, y1)]
Remove old FIXME comment [CI skip]
Remove temporary print
Change exception into a warning
Remove redundant comment [CI skip]
Add config file for coverage.py to exclude some common things: http://nedbatchelder.com/code/coverage/config.html
Simple spider test. Test image created with Pillow.
pyflakes
More spider tests
Make sure nvalues is int and not float for Python 3
pep8/pyflakes
Set limit to to around a quarter gigabyte for a 24 bit (3 bpp) image
Remove stray debug print
Test decompression bomb warnings
Remove redundant commented code [CI skip]
Added support for OpenJPEG 2.1.
Changed test for OpenJPEG 2.0
Oops.  Fixed a silly mistake.