Update client documentation content

app/templates/views/documentation.html

@@ -24,6 +24,11 @@
   </ul>
     <p>A developer should be able to set up the API client and start sending test messages in around 30 minutes. A full integration might take a couple of days.</p>
   <h2>Integrating directly with the API</h2>
-    <p>You can integrate directly with the Notify API. Reading the client documentation will help you to do this.</p>
+    <p>You can integrate directly with the Notify API.</p>
     <p>To send a message you'll need to create an HTTPS request and add an authorisation header with your API key. The API key is encoded with JSON Web Tokens (JWT).</p>
+    <p>You should also read the client documentation to understand:</p>
+  <ul class="list list-bullet">
+    <li>what the API client does</li>
+    <li>what development work you'll need to do</li>
+  </ul>
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