techiferous/rack-environmental — pull request #3 by pjmorse (2013-09-24 13:37:26+00:00)
Title: Pass xhr request

I was seeing issues with XHR requests getting the rack-environmental header appended, which was making certain AJAX transactions squirrely. (Think in-place editing: what if the header is added to the edited fragment?) So 2d93e28 ignores XHR requests.