Update readme

Author: knolleary

README.md

@@ -1,38 +1,42 @@
-# Node-RED Admin
+# Node-RED Admin CLI
 
 The Node-RED admin command line interface.
 
 [![Build Status](https://travis-ci.org/node-red/node-red-admin.svg?branch=master)](https://travis-ci.org/node-red/node-red-admin) [![Coverage Status](https://coveralls.io/repos/node-red/node-red-admin/badge.svg?branch=master)](https://coveralls.io/r/node-red/node-red-admin?branch=master)
 
 
-A command line tool for Node-RED administrations.
+A command line tool for remotely administering Node-RED.
 
 Install this globally to make the `node-red-admin` command available on your path:
 
     npm install -g node-red-admin
 
-Note: you may need to run this with `sudo`, or from within an Administrator command shell. 
+Note: you may need to run this with `sudo`, or from within an Administrator command shell.
 
 You may also need to add `--unsafe-perm` to the command if you hit permissions errors during install.
 
-
 ## Usage
 
     Usage:
-       node-red-admin <command> [args] [--help]
-    
+       node-red-admin <command> [args] [--help] [--userDir DIR] [--json]
+
     Description:
        Node-RED command-line client
-    
+
     Commands:
        target  - Set or view the target URL and port like http://localhost:1880
        login   - Log user in to the target of the Node-RED admin API
        list    - List all of the installed nodes
        info    - Display more information about the module or node
        enable  - Enable the specified module or node set
        disable - Disable the specified module or node set
-       search  - Search NPM for Node-RED modules by matching name, description or keywords with the term
-       install - Install the module from NPM
-       remove  - Remove the NPM module
-       hash-pw - creates a hash to use for Node-RED settings like "adminAuth"
+       search  - Search for Node-RED modules to install
+       install - Install the module from NPM to Node-RED
+       remove  - Remove the NPM module from Node-RED
+       hash-pw - Creates a hash to use for Node-RED settings like "adminAuth"
+
+By default, the tool stores its configuration in `~/.node-red/.cli-config.json`. You
+can specify a different directory for the config file using the `--userDir` argument.
 
+The `--json` option causes the tool to format its output as JSON making it suitable
+for scripting.