Updated README with the new request features

Author: oscarotero

README.md

@@ -77,6 +77,31 @@ Embed provides a RequestResolvers\Curl class to resolve all requests using the c
 Embed\Request::setDefaultResolver('MyCustomResolverClass');
 ```
 
+You can configure also the following options of the request resolver:
+
+* user_agent: User agent used in all requests. By default is "Embed PHP Library"
+* max_redirections: The maximum amount of HTTP redirections to follow. By default is 20
+* connection_timeout: The number of seconds to wait while trying to connect. Use 0 to wait indefinitely. By default is 10
+* timeout: The maximum number of seconds to allow execute the request. By default is 10
+
+To set a new configuration:
+
+```php
+Embed\Request::setResolverConfig(array(
+	'user_agent' => 'My spider',
+	'connection_timeout' => 0
+));
+```
+
+Or you can set your custom resolver class and the configuration at the same time:
+
+```php
+Embed\Request::setDefaultResolver('MyCustomResolverClass', array(
+	'user_agent' => 'My spider',
+	'connection_timeout' => 0
+));
+```
+
 
 Online demo
 -----------