Document jenv export plugin

README.md

@@ -244,6 +244,14 @@ Let's say you want Maven to use the JDK activated with Jenv, not the default `JA
 
 Note: The enable-plugin functionality is system wide not local to the shell, or temporary - you only need to do each one once.
 
+### Export plugin
+Another one usefull plugin is the "export", that expose JAVA_HOME automatically :
+
+  $ jenv enable-plugin export
+    You may restart your session to activate jenv export plugin echo export plugin activated
+
+
+
 ## Development
 
 The jenv source code is [hosted on