Web-based advisory index using Octopress

I converted the site to Octopress (with a few hiccups) and wrote a system that automatically imports the YAML advisories as Markdown versions which can be run through Octopress to produce HTML versions:

## Home page

![Home page](http://i.imgur.com/ciEnu2Z.png)

## Listing advisories

![Advisory list](http://i.imgur.com/OhXHWUD.png)

## An individual advisory

![Individual advisory](http://i.imgur.com/e6SV8KM.png)