[notodiff] Use PIL for render diffing
[notodiff] Use PIL for render diffing

googlei18n/nototools,googlefonts/nototools,moyogo/nototools,dougfelt/nototools,dougfelt/nototools,googlefonts/nototools,googlei18n/nototools,googlei18n/nototools,anthrotype/nototools,googlefonts/nototools,moyogo/nototools,dougfelt/nototools,anthrotype/nototools,moyogo/nototools,anthrotype/nototools,googlefonts/nototools,googlefonts/nototools