Merge pull request #1790 from edx/ben/docs-updates

No longer in alpha, comments update.

README.md

@@ -2,8 +2,6 @@
 
 ## Introduction
 
-**This project is currently in alpha**
-
 The goal of the edx/configuration project is to provide a simple, but
 flexible, way for anyone to stand up an instance of Open edX that is
 fully configured and ready-to-go.

playbooks/run_role.yml

 ---
-# Creates a new ansible role
+# Runs an ansible role
 # Usage:
 #   ansible-playbook ./run_role.yml -i "hostname," -e role=my_awesome_role
 #