Fix 12-year-old FIXME
Some pep8 and pyflakes cleanup
Simple test for saving to PDF
Add some more pdf tests
Fix CMYK test
Temporarily remove failing P-mode PDF test
Add monochrome PDF test
Temporarily remove 'failing' 1-mode PDF test
Temporarily remove 'failing' 1-mode PDF test
Fix tostring()/tobytes() warning and reinstate test
Fix bytes/str and reinstate test
pep8 and pyflakes
merge from master
Merge pull request #667 from wiredfool/hugovk_pdf

PDF Tests and Fixes merge
Noted previous default
Doc formatting fix
Merge pull request #668 from wiredfool/hugovk_pdf

Doc Update for Image.thumbnail
Updated changes [ci-skip]