Cleanup footer links

Minor fixes as a follow-up to #1340
* Assembla is HTTPS-only
* Mailing list is members-only, so link to the group instead and call it
  "mailing list" instead of "email"
* getontracks.org's canonical URL has no www
* Make the same changes to the mobile footer
* The forum is no longer referenced, so purge from translations

app/views/shared/_footer.html.erb

@@ -1,8 +1,8 @@
 <div id="footer">
-  <p><%= t('footer.send_feedback', :version => TRACKS_VERSION) %>: <a href="http://www.assembla.com/spaces/tracks-tickets/tickets"><%= t('common.bugs')%></a> |
+  <p><%= t('footer.send_feedback', :version => TRACKS_VERSION) %>: <a href="https://www.assembla.com/spaces/tracks-tickets/tickets"><%= t('common.bugs')%></a> |
     <a href="https://github.com/TracksApp/tracks/wiki"><%= t('common.wiki')%></a> |
-    <a href="mailto:tracksapp@googlegroups.com?subject=Tracks feedback"><%= t('common.email')%></a> |
-    <a href="http://www.getontracks.org/"><%= t('common.website')%></a> |
-    <a href="http://getontracks.org/development"><%= t('common.contribute')%></a></p>
+    <a href="http://groups.google.com/group/TracksApp"><%= t('common.mailing_list')%></a> |
+    <a href="http://getontracks.org/"><%= t('common.website')%></a> |
+    <a href="http://getontracks.org/development/"><%= t('common.contribute')%></a></p>
     <%= link_to(t('layouts.navigation.mobile'), todos_path(:format => 'm')) %>
 </div>

app/views/shared/_footer.m.erb

@@ -1 +1 @@
-<div class="footer"><p>Mobile Tracks <%= TRACKS_VERSION %>: <a href="mailto:butshesagirl@rousette.org.uk?subject=Tracks feedback">Email</a> | <a href="http://www.getontracks.org/">Website</a> | <a href="http://getontracks.org/tracks/contribute">Contribute</a></p></div>
+<div class="footer"><p>Mobile Tracks <%= TRACKS_VERSION %>: <a href="http://groups.google.com/group/TracksApp"><%= t('common.mailing_list')%></a> | <a href="http://getontracks.org/"><%= t('common.website')%></a> | <a href="http://getontracks.org/development/"><%= t('common.contribute')%></a></p></div>

config/locales/cz.yml

@@ -106,7 +106,6 @@ cz:
     errors_with_fields: "Nastaly potíže s následujícími polí?ky:"
     first: První
     forth: "?tvrtý"
-    forum: Fórum
     fourth: "?tvrtý"
     go_back: Zp?t
     last: Poslední

config/locales/de.yml

@@ -105,7 +105,6 @@ de:
     errors_with_fields: "Mit folgenden Feldern sind Probleme aufgetreten:"
     first: Erste
     forth: Vierte
-    forum: Forum
     fourth: Vierte
     go_back: Zurück
     last: Letzte

config/locales/en.yml

@@ -110,7 +110,6 @@ en:
     second: Second
     month: month
     server_error: An error occurred on the server.
-    forum: Forum
     notes: Notes
     review: Review
     last: Last
@@ -150,6 +149,7 @@ en:
     weeks: weeks
     wiki: Wiki
     email: Email
+    mailing_list: Mailing List
     search: Search
     ajaxError: There was an error retrieving from server
     days_midsentence:

config/locales/es.yml

@@ -105,7 +105,6 @@ es:
     errors_with_fields: "Ha habido problemas con los siguientes campos:"
     first: Primero
     forth: Siguiente
-    forum: Foro
     fourth: Cuarto
     go_back: "Volver atrás"
     last: Último

config/locales/fr.yml

@@ -106,7 +106,6 @@ fr:
     errors_with_fields: "Il y a des problème avec les champs suivants :"
     first: Premier
     forth: FORTH
-    forum: Forum
     fourth: Quatrième
     go_back: Retour
     last: Dernier

config/locales/he.yml

@@ -102,7 +102,6 @@ he:
     errors_with_fields: "?????? ????? ?????????"
     first: "?????"
     forth: "?????"
-    forum: "?????"
     fourth: "?????"
     go_back: "????"
     last: "?????"

config/locales/nl.yml

@@ -106,7 +106,6 @@ nl:
     errors_with_fields: "Er waren problemen met de volgende velden"
     first: Eerste
     forth: Vierde
-    forum: Forum
     fourth: Vierde
     go_back: "Ga terug"
     last: Laatste