Adding alias from /blog/atom.xml -> /atom.xml.
Bumping up submodule commit hash.
Merge pull request #891 from ycombinator/dev

Adding alias from /blog/atom.xml -> /atom.xml.
Merge pull request #892 from ycombinator/nginx-version

Bumping up submodule commit hash.
Merge pull request #893 from rackerlabs/dev

Pushing to production after reviewing on staging