LearnBoost/knox — pull request #74 by jedwood (2012-07-18 01:09:14+00:00)
Title: Update example in README to use correct content-type

Silly little change, but it tripped us up. Files with 'Content-Type':
'image/jpg' were giving us browser warnings, since it should technically
be 'Content-Type': 'image/jpeg'.
http://en.wikipedia.org/wiki/MIME_type#Type_image