Adds a link on blog posts to return to /news/
move robots.txt out of project root
Merge pull request #325 from 18F/move-robots

Move robots.txt out of project root
Merge pull request #326 from 18F/move-404

Move the 404 page out of the root too
Merge pull request #312 from 18F/back-to-news

Adds a link on blog posts to return to /news/
Merge branch 'staging' into syntax