Remove empty string class passed to contact template

FREEBIE

background.html

@@ -255,7 +255,7 @@
   </script>
   <script type='text/x-tmpl-mustache' id='contact'>
       {{> avatar }}
-      <div class='contact-details {{ class }}'> {{> contact_name_and_number }} </div>
+      <div class='contact-details {{ #class }} {{ class }} {{ /class}}'> {{> contact_name_and_number }} </div>
   </script>
   <script type='text/x-tmpl-mustache' id='new-contact'>
       {{> avatar }}

js/views/contact_list_view.js

@@ -31,7 +31,6 @@
                 }
 
                 return {
-                    class: '',
                     title: this.model.getTitle(),
                     number: this.model.getNumber(),
                     avatar: this.model.getAvatar(),