update docs

README.md

@@ -17,14 +17,26 @@ crowdsso
 This as a system plugin enabling sso against atlassian 
 crowd. 
 
+Features
+========
+
+- authorization against crowd
+- sso authorization (respects existing crowd token or sets it after successfull login)
+- group sync (one-way: receives groups from crowd and add user to these groups, 
+  removes user from all other groups)
+- group mapping: map crowd groups to joomla group ids
+- user removal: users removed from crowd will be removed from joomla on next
+  login too
+
 Installation
 ============
 
 Create zips from both packages:
 ..../joomlacrowd: zip crowd.zip crowd/crowd.*
 .../joomlacrowd: zip crowdsso.zip crowdsso/crowd.*
 
-Install these zips as usual. 
+Install these zips as usual. You need both plugins!
+Configure the plugins from withing joomal as usual. 
 
 Debug
 =====