(aur-security) Update README

README.md

@@ -3,22 +3,23 @@ The Aura Package Manager
 
 Welcome to the main repository for all things Aura.
 
-Aura
-----
+## Aura
 
 [![Build Status](https://travis-ci.org/aurapm/aura.svg?branch=master)](https://travis-ci.org/aurapm/aura)
 [![Join the chat at https://gitter.im/aurapm/aura](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/aurapm/aura?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
 Aura is a package manager for Arch Linux and its AUR.
 See [its README](/aura/README.md) for more information.
 
-The `aur` Haskell Library
--------------------------
+## The `aur` Haskell Library
 
 A library for accessing the AUR, powered by
 [Servant](http://haskell-servant.readthedocs.org/en/stable/).
 
-The `arel` Tool
----------------
+## The `aur-security` Tool
+
+Performs a sweep of all PKGBUILDs on the AUR, looking for Bash misuse.
+
+## The `arel` Tool
 
 A release tool for publishing Aura releases.