Merge pull request #13 from vmaneagit/patch-13

Update nodegroupattrib.ronn.tmpl

confluent_client/doc/man/nodegroupattrib.ronn.tmpl

@@ -25,8 +25,17 @@ the attributes are set on the node versus a group to which a node belongs.
 
 ## OPTIONS
 
+* `-b`, `--blame`:
+  Show information about how attributes inherited
+
+* `-e`, `--environment`:
+  Set attributes, but from environment variable of same name
+
 * `-c`, `--clear`:
   Clear specified nodeattributes.
+  
+* `-p`, `--prompt`:
+  Prompt for attribute values interactively
 
 ## EXAMPLES