Made some changes to img tags to enforce max-width everywhere, and to the page headers to allow user scaling.
Merge branch 'master' of https://github.com/chriswinstead/red
Made code changes to serve higher resolution images in displays with high pixel density.
Changed some comments.
Removed some unnecessary changes.
Merge pull request #454 from chriswinstead/master

Detect high-resolution displays (like retina) and serve higher resolution photo thumbnails