Fix links to lesson in mod 2 intro

Author: PaulDaviesC

twitter-client-tutorial/_lesson_group_shared_preference.html.md

@@ -5,7 +5,14 @@ In the real Twitter client, once you log in successfully, you will not see the l
 We are introducing data handling in this module. The network calls will be introduced in the subsequent module. We make things a little sub-optmial. Instead of sending data to the server & getting an authentication token, we will simply store the username password from the login screen. 
 
 <div class="alert alert-warning"><b>Warning</b>: It is never a good idea to store passwords locally, plaintext or otherwise. But for the sake of this module, we overlook best practices to get a better understanding of SharedPreferences</div>
+<div>
+<% count = 1 %>
+<% lessons_of_mod_2 = AppLesson.find_all_by_module_number(2) %> 
 
-1. <%= link_to "Reading login data", app_tutorial_lesson_with_token_path("twitter", AppLesson.find_by_number(@current_lesson.number + 1).lesson.token ) %>
-2. <%= link_to "Writing login data to Shared Preference", app_tutorial_lesson_with_token_path("twitter", AppLesson.find_by_number(@current_lesson.number + 2).lesson.token ) %>
-3. <%= link_to "Modify flow to not show login screen if login data exists", app_tutorial_lesson_with_token_path("twitter", AppLesson.find_by_number(@current_lesson.number + 1).lesson.token ) %>
+<% lessons_of_mod_2.each do |l| %>
+	<%= count %> .
+	<% count = count + 1 %>
+	<%= link_to l.lesson.title, app_tutorial_lesson_with_token_path(@app_name, l.lesson_module.lesson.token, l.lesson.token) %>
+	<br/>
+<% end %>
+</div>