README edits

README.adoc

@@ -2,16 +2,18 @@
 
 Grouper plugin that provides configurable authentication. Features include
 
-* Authentication for UI
-* Multiple methods, including SAML2 and OIDC
+* Authentication for UI, without requiring a separate process or container
+* Supports SAML2, OIDC, and CAS
 
 == Usage
 
-=== Version 4.x
+=== Grouper Version 4.x
 
-For a fully integrated sample configuration, see `src/test/docker` in the git repo at https://github.internet2.edu/internet2/grouper-ext-auth[]
+NOTE: For a fully integrated sample configuration, see the docker-compose setup in the `src/test/docker` folder of the Git
+repository. The environment includes sample Grouper configurations for SAML2, OIDC, or CAS, along with a Shibboleth IDP
+that can authenticate Grouper using any of these methods.
 
-. Add plugin to Grouper image (Latest versions can be downloaded from https://github.internet2.edu/internet2/grouper-ext-auth/releases[])
+. Add plugin to Grouper image (latest versions can be downloaded from https://github.internet2.edu/internet2/grouper-ext-auth/releases[])
 +
 [source, dockerfile]
 ----