Added more description, examples, and installation notes

README.md

@@ -1,5 +1,54 @@
 # Rhumsaa\Uuid
 
-A PHP 5.3+ library for generating and working with
-[RFC 4122](http://tools.ietf.org/html/rfc4122) version 1, 3, 4, and 5
-universally unique identifiers (UUID).
+[![Build Status](https://secure.travis-ci.org/ramsey/uuid.png)](http://travis-ci.org/ramsey/uuid)
+
+A PHP 5.3+ library for generating and working with [RFC 4122][rfc4122] version
+1, 3, 4, and 5 universally unique identifiers (UUID).
+
+Much inspiration for this library came from the [Java][javauuid] and
+[Python][pyuuid] UUID libraries.
+
+## Examples
+
+```php
+<?php
+
+use Rhumsaa\Uuid\Uuid;
+
+// Generate a version 1 (time-based) UUID
+$uuid1 = Uuid::uuid1();
+echo $uuid1 . "\n"; // e4eaaaf2-d142-11e1-b3e4-080027620cdd
+
+// Generate a version 3 (name-based and hashed with MD5) UUID
+$uuid3 = Uuid::uuid3(Uuid::NAMESPACE_DNS, 'php.net');
+echo $uuid3 . "\n"; // 11a38b9a-b3da-360f-9353-a5a725514269
+
+// Generate a version 4 (random) UUID
+$uuid4 = Uuid::uuid4();
+echo $uuid4 . "\n"; // 25769c6c-d34d-4bfe-ba98-e0ee856f3e7a
+
+// Generate a version 5 (name-based and hashed with SHA1) UUID
+$uuid5 = Uuid::uuid5(Uuid::NAMESPACE_DNS, 'php.net');
+echo $uuid5 . "\n"; // c4a760a8-dbcf-5254-a0d9-6a4474bd1b62
+```
+
+
+## Installation
+
+The preferred method of installation is via [Packagist][], as this provides
+the PSR-0 autoloader functionality. The following `composer.json` will download
+and install the latest version of the Uuid library into your project:
+
+```json
+{
+    "require": {
+        "rhumsaa/uuid": "*"
+    }
+}
+```
+
+
+[rfc4122]: http://tools.ietf.org/html/rfc4122
+[javauuid]: http://docs.oracle.com/javase/6/docs/api/java/util/UUID.html
+[pyuuid]: http://docs.python.org/library/uuid.html
+[packagist]: http://packagist.org/