Add a link to contribute translations to the localisation drop-down.

app/views/layouts/application.html.erb

@@ -113,6 +113,10 @@
 
             <ul class="dropdown-menu">
               <%= locale_switcher_entries %>
+              <a href="https://wiki.diasporafoundation.org/Contribute_translations" 
+              		title="Contribute translations">
+              	<%= t '.translate' %>
+              </a>
             </ul>
           </div>
         </div>

config/locales/en.yml

@@ -24,6 +24,7 @@ en:
       discussion_general: "Discussion - General"
       discussion_development: "Discussion - Development"
       choose_language: "Choose language"
+      translate: "Translate it!"
       cc_license_alt: "Creative Commons License"
       licensed_under: "%{site_link} is licensed under a %{license_link}"
       license_link_text: "Creative Commons Attribution 3.0 Unported License"
@@ -170,7 +171,7 @@ en:
       support_header: "Provide support"
       support_ex1: "Help new users feel welcome!"
       support_ex2: "Sign up here"
-      support_ex3: "Write user tutorials at %{diasporial_link}."
+      support_ex3: "Write user tutorials for the %{tutorials_link} section."
       support_ex4: 'Answer users’ questions on our %{irc_channel_link} or answer users’ questions on diaspora* itself by following the <span class="click">#help</span>, <span class="click">#question</span> and <span class="click">#feedback</span> hashtags.'
       irc_channel_link_text: "IRC channel"
       support_ex5: "Contribute to %{wiki_link}."