Fine tuned abilities and updated how membership is tracked

app/views/certifications/_form.html.erb

@@ -19,10 +19,6 @@
     <%= f.label :description %><br />
     <%= f.text_area :description %>
   </div>
-  <% f.fields_for :users do |u| %>
-    <%= u.label :user %><br />
-    <%= collection_select(:certifications_users, :user_id, User.all.sort_by(&:name), :id, :name) %>
-  <% end %>
   <div class="actions">
     <%= f.submit %>
   </div>

app/views/certifications/index.html.erb

@@ -1,6 +1,6 @@
 <h1>Listing certifications</h1>
 
-<%= link_to 'New Certification', new_certification_path if can? :create, Certification %>
+<%= link_to 'Create Certification', new_certification_path if can? :create, Certification %> 
 
 <ul>
 <% @certifications.each do |certification| %>

app/views/certifications/show.html.erb

@@ -10,10 +10,10 @@
 
 <b>Certified Users:</b>
 <ul>
-  <% @certification.users.each do |user| %>
-    <li><%= link_to user.name, user %></li>
+  <% @certification_users.each do |user| %>
+      <li><%= link_to user.name, user %></li>
   <% end %>
-  <% if @certification.users.blank? then %><li>n/a</li><% end %>
+  <% if @certification_users.blank? then %><li>n/a</li><% end %>
 </ul>
 
 <% if can? :update, @certification %><%= link_to 'Edit', edit_certification_path(@certification) %> |<% end %>