thumbor/thumbor — pull request #389 by kevin1024 (2014-11-21 02:38:09+00:00)
Title: Add Option to Disable Etags

I noticed that Tornado is automatically calculating etags for
images, but that didn't work well with my caching strategy. I have
added the option to disable this. I have it on by default since
the current version of Thumbor will auto-generate etags for you.