minor comment update

Author: heckj

README.md

@@ -3,7 +3,7 @@ RackHD documentation source for http://rackhd.readthedocs.org
 
 [![Documentation Build Status](https://readthedocs.org/projects/rackhd/badge/?version=latest)](https://readthedocs.org/projects/rackhd/?badge=latest)
 
-## Setting up for building the docs
+## Setting up for editing and building the docs
 
 create a virtualenv and set up the requirements