Update readme.

README.md

@@ -1,12 +1,20 @@
 # postmaster-general
 [![MIT License](https://img.shields.io/badge/license-MIT-blue.svg?style=flat-square)](https://github.com/darklordzw/postmaster-general/blob/master/LICENSE.md) [![Build Status](https://travis-ci.org/darklordzw/postmaster-general.svg?branch=master)](https://travis-ci.org/darklordzw/postmaster-general) [![Coverage Status](https://coveralls.io/repos/github/darklordzw/postmaster-general/badge.svg?branch=master)](https://coveralls.io/github/darklordzw/postmaster-general?branch=master)
 
-Dead-simple, ready-to-use, promise-based Node.js library, for microservice communication over [AMQP][1] using [amqplib][3].
+Dead-simple, ready-to-use, promise-based Node.js library for microservice communication over [AMQP][1] using [amqplib][3].
 
-This library attempts to provide a simple, ready-to-go microservice message bus with default settings based on production usage.
+## Features
+postmaster-general strives to be unopinionated, serving as a thin wrapper around [amqplib][3] that sets some sensible defaults and encourages best-practices, including:
+
+* Dedicated channels for publishing, consuming, and asserting topology.
+* Single-purpose listener queues, no mixing messages.
+* Built-in RPC support.
+* Automatic reconnect on connection failure and channel error.
 
 ## Install
 
+Note: This library makes heavy use of the async/await keywords, and requires Node.js 7+.
+
 ```sh
 npm install --save postmaster-general
 ```
@@ -15,33 +23,70 @@ npm install --save postmaster-general
 The following snippet showcases basic usage.
 
 ```js
-const PostmasterGeneral = require('../postmaster-general');
+const PostmasterGeneral = require('postmaster-general');
 
-const postmaster = new PostmasterGeneral('pub-sub');
+const postmaster = new PostmasterGeneral({ logLevel: 'debug' });
 
-// Start the Postmaster instance.
-postmaster.addListener('action:get_greeting', function (message, done) {
+const printGreeting = async (message) => {
 	console.log('[action:get_greeting] received');
-	return done(null, {
-		greeting: 'Hello, ' + message.name
-	});
-})
+	return { greeting: 'Hello, ' + message.name };
+};
+
+// Start the Postmaster instance.
+postmaster.connect()
+	.then(() => postmaster.addListener('action:get_greeting', printGreeting))
 	// Add a listener callback.
-	.then(() => postmaster.start())
+	.then(() => postmaster.startConsuming())
 	// Publish a fire-and-forget message.
-	.then(() => postmaster.publish('action:get_greeting', {name: 'Bob'}))
+	.then(() => postmaster.publish('action:get_greeting', { name: 'Bob' }))
 	// Publish a message with a callback.
-	.then(() => postmaster.request('action:get_greeting', {name: 'Steve'}))
+	.then(() => postmaster.request('action:get_greeting', { name: 'Steve' }))
 	// Handle the callback.
 	.then((res) => {
 		console.log(res.greeting);
+	})
+	// Shut everything down.
+	.then(() => postmaster.shutdown())
+	.catch((err) => {
+		console.log(err.message);
+	})
+	.then(() => {
+		process.exit();
 	});
 
 ```
 
-### Wildcards
-postmaster-general supports the [default AMQP wildcards for topic routes][4].
+### Options
+The following options may be overridden in the constructor:
 
+```json
+{
+	"connectRetryDelay": 1000,
+	"connectRetryLimit": 3,
+	"consumerPrefetch": 1,
+	"deadLetterExchange": "postmaster.dlx",
+	"exchanges": {
+		"dlx": {
+			"name": "postmaster.dlx",
+			"type": "topic"
+		},
+		"topic": {
+			"name": "postmaster.topic",
+			"type": "topic"
+		}
+	},
+	"handlerTimingResetInterval": 30000,
+	"heartbeat": 30,
+	"logLevel": "warn",	
+	"publishRetryDelay": 1000,
+	"publishRetryLimit": 3,
+	"queuePrefix": "postmaster.queue",
+	"removeListenerRetryDelay": 1000,
+	"removeListenerRetryLimit": 3,
+	"shutdownTimeout": 30000,
+	"url": "amqp://guest:guest@localhost:5672"
+}
+```
 
 ## License
 Licensed under the [MIT][2] license.