sorl/sorl-thumbnail — pull request #164 by mgedmin (2013-09-12 11:45:13+00:00)
Title: Recommend Pillow instead of PIL

PIL is unmaintained, doesn't support setuptools properly, and doesn't build correctly on modern (multi-arch-enabled) Ubuntu systems.

Pillow is a friendly fork of PIL that's actively maintained (on GitHub) and fixes all of those problems.