Updates the content to request user to Go to setup in hello world lesson

Author: PaulDaviesC

twitter-client-tutorial/_hello_world.html.md

@@ -1,6 +1,7 @@
 # Hello World
 
-Now that we have the Android Hello World app running in the previous lesson, let's understand the Android app control flow a bit. We have created a screencast for you to help you understand the flow faster.
+If you have not setup our Virtual Assistant so far, kindly click the *Go to setup* button on the right. Now in the setup lesson we have the Android Hello World app running, let's understand the Android app control flow a bit. We have created a screencast for you to help you understand the flow faster.
+
 
 <div class="alert alert-info">To understand the building blocks of Android apps, refer the <b><%= link_to "Android Introduction concept lesson", android_concept_lesson_path("android-introduction"), target: "_blank" %></b></div>