Added doc about clients

Author: Nyholm

README.md

@@ -56,27 +56,47 @@ If you need a more custom setup, define the services in your application configu
 
 ```yaml
 httplug:
-    main_alias:
-        client: httplug.client.default
-        message_factory: httplug.message_factory.default
-        uri_factory: httplug.uri_factory.default
-        stream_factory: httplug.stream_factory.default
-    classes:
-        # uses discovery if not specified
-        client: ~
-        message_factory: ~ 
-        uri_factory: ~
-        stream_factory: ~
-    clients: 
-        acme: 
-            adapter: guzzle5
-            config:
-                timeout: 2
-                verify: false
+  main_alias:
+    client: httplug.client.default
+    message_factory: httplug.message_factory.default
+    uri_factory: httplug.uri_factory.default
+    stream_factory: httplug.stream_factory.default
+  classes:
+    # uses discovery if not specified
+    client: ~
+    message_factory: ~ 
+    uri_factory: ~
+    stream_factory: ~
+```
+
+#### Configure your client
+
+You can configure your clients with some good default options. The clients are later registered as services. 
+
+```yaml
+httplug:
+  clients: 
+    my_guzzle5: 
+      adapter: guzzle5
+      config:
+        # These options are given to Guzzle without validation. 
+        base_url: 'http://google.se/'
+        defaults:
+          verify_ssl: false
+          timeout: 4
+          headers:
+            Content-Type: 'application/json'
+    acme: 
+      adapter: guzzle6
+      config:
+        # These options are given to Guzzle without validation. 
+        base_url: 'http://google.se/'
+       
 ```
 
 ```php
 
+$httpClient = $this->container->get('httplug.my_guzzle5');
 $httpClient = $this->container->get('httplug.acme');
 ```