Add notes about notifications on the help page

lib/Vroom/I18N/en.pm

@@ -198,6 +198,10 @@ our %Lexicon = (
   "HELP_RESERVE_YOUR_ROOM"               => "Want to reserve your room name so it's always available for you (company name, ongoing project " .
                                             "etc.) ? Just set both a join password and the manager password. The room will be kept " .
                                             "as long as the manager password is set (and as long as you use it from time to time)",
+  "BE_NOTIFIED"                          => "Notifications",
+  "HELP_BE_NOTIFIED"                     => "You can be notified by email as soon as someone joins one of your rooms. For example, " .
+                                            "create a room, add a password to make it persistent and add the link in your email signature. " .
+                                            "When someone wants to talk with you, you'll get the notification",
   "ABOUT_VROOM"                          => "VROOM is a free spftware using the latest web technologies and lets you " .
                                             "to easily organize video meetings. Forget all the pain with installing " .
                                             "a client on your computer in a hury, compatibility issues between MAC OS " .

lib/Vroom/I18N/fr.pm

@@ -216,6 +216,11 @@ our %Lexicon = (
                                                    "un mot de passe pour rejoindre le salon et un mot de passe de gestionnaire. Le " .
                                                    "salon sera conservé aussi longtemps que le mot de passe de gestionnaire est en place ".
                                                    "(du moment que vous vous en servez de temps en temps)",
+    "BE_NOTIFIED"                               => "Notifications",
+    "HELP_BE_NOTIFIED"                          => "Vous pouvez être notifiés par email dès que quelqu'un rejoint un de vos salons. " .
+                                                   "Par exemple, créez un salon, ajoutez un mot de passe pour le rendre persistant et " .
+                                                   "ajoutez le lien dans votre signature de mail. Dès que quelqu'un cherche à discuter " .
+                                                   "avez vous, vous recevrez une notification",
     "ABOUT_VROOM"                               => "VROOM est un logiciel libre exploitant les dernières technologies du " .
                                                    "web vous permettant d'organiser simplement des visio conférences. Fini " .
                                                    "les galères à devoir installer un client sur le poste au dernier moment, " .

templates/default/help.html.ep

@@ -73,6 +73,20 @@
         </div>
       </div>
     </div>
+    <div class="panel panel-default">
+      <div class="panel-heading">
+        <h4 class="panel-title">
+          <a data-toggle="collapse" data-parent="#accordion" href="#collapseBeNotified">
+            <%=l 'BE_NOTIFIED' %>
+          </a>
+        </h4>
+      </div>
+      <div id="collapseBeNotified" class="panel-collapse collapse">
+        <div class="panel-body">
+          <%==l 'HELP_BE_NOTIFIED' %>
+        </div>
+      </div>
+    </div>
   </div>
 </div>
 %= include 'js_common'