Add purpose

README.md

@@ -1 +1,14 @@
 # shib-idp-conftree
+
+## Purpose
+
+This project contains the configuration tree (structure) for Shibboleth IDP.  The are various usage scenarios throughout the build, test, deploy cycle that warrant this abstraction
+of the configuration tree.  There is a separate repository for the Docker Image which is responsible for building the runtime environment and pulling the configuration trees housed here
+to complete a deployment.
+
+### Configuration Trees
+
+  * `test` branch
+    * Internal Testing - (TEST) branch/repo that uses the "test bed" which is something that I2 provides (LDAP) and an element to make all integrations.  Appropriate for Jenkins and testing environments
+  * `release` branch
+    * External Testing - (RELEASE) branch/repo (ultimately will live in Subversion?) for end users