Add more info to Readme

Author: aleplusplus

README.md

@@ -11,3 +11,36 @@
 
 [travis-status]: https://travis-ci.org/aleplusplus/soapclient-curl-php.svg?branch=maste
 [travis-url]: https://travis-ci.org/aleplusplus/soapclient-curl-php
+
+## Install:
+
+Via composer:
+
+```
+$ composer require aleplusplus/soapclient-curl-php
+```
+
+## Usage:
+
+Using the `SoapClientCurl\SoapClientRequest`:
+
+```php
+    use SoapClientCurl\SoapClientRequest;
+
+    $claveAccesoComprobante = '1302201501179188978900110010010000100520001005215';
+
+    $url = 'https://celcer.sri.gob.ec/comprobantes-electronicos-ws/AutorizacionComprobantes';
+    
+    $body = '<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ec="http://ec.gob.sri.ws.autorizacion">
+                <soapenv:Header/>
+                <soapenv:Body>
+                    <ec:autorizacionComprobante>
+                            <claveAccesoComprobante>'.$claveAccesoComprobante.'</claveAccesoComprobante>
+                    </ec:autorizacionComprobante>
+                </soapenv:Body>
+            </soapenv:Envelope>';
+
+    $headers = array('Content-Type: text/xml; charset=utf-8', 'Content-Length: '.strlen($body));
+    
+    $result = SoapClientRequest::send($url, $headers, $body);
+```