Updated readme.

README.md

@@ -20,9 +20,58 @@ by adding it as a dependency to your project's composer.json file.
 }
 ```
 
+After running `php composer.phar update` on the command line, include the
+autoloader in your PHP scripts so that the SDK classes are made available.
+
+```php
+require_once 'vendor/autoload.php';
+```
+
 Please refer to [Composer's documentation](https://github.com/composer/composer/blob/master/doc/00-intro.md#introduction)
 for more detailed installation and usage instructions.
 
 ## Usage
 
-@todo
+### XMLRPC
+
+The following example returns a list of products with SKUs that start with "123":
+
+```php
+
+use Magento\Client\Xmlrpc\MagentoXmlrpcClient;
+
+$client = MagentoXmlrpcClient::factory(array(
+    'base_url' => 'http://magentohost',
+    'api_user' => 'api.user',
+    'api_key'  => 'some.private.key',
+));
+
+$filters = array(
+    'sku' => array('like' => '123%'),
+);
+
+$result = $client->call('catalog_product.list', array($filters));
+```
+
+### Rest
+
+The following example returns a list of products:
+
+```php
+
+use Magento\Client\Rest\MagentoRestClient;
+
+$client = MagentoRestClient::factory(array(
+    'base_url'        => 'http://magentohost',
+    'consumer_key'    => 'abc123...',
+    'consumer_secret' => 'def456...',
+    'token'           => 'ghi789...',
+    'token_secret'    => 'jkl012...',
+));
+
+$result = $client->get('/api/rest/products')->send()->json();
+
+```
+
+Refer to [Guzzle's documentation](https://guzzle.readthedocs.org/en/latest/http-client/request.html#creating-requests-with-a-client)
+for more information on sending requests to the server.