I18n of the request of invitation email and add piwik gem

Gemfile

@@ -38,3 +38,5 @@ group :test, :development do
   gem "sqlite3"
   gem "faker"
 end
+
+gem 'piwik_analytics', '~> 1.0.1'

app/views/invitation_request_mailer/invitation_request.text.erb

@@ -1,15 +1,13 @@
-Hello <%= @invitation_request.email %>,
+<%= t '.title', :email => "#{@invitation_request.email}" %>
 
-Someone at <%= @invitation_request.ip_address %> has submitted an invitation request to
-<%= Rails.application.name %>.
+<%= t '.invitedto', :userip => "#{@invitation_request.ip_address}", :appname => "#{Rails.application.name}" %>
 
-  Name: <%= @invitation_request.name %>
-  E-mail: <%= @invitation_request.email %> (won't be displayed to other users)
-  Memo: <%= @invitation_request.memo %>
+  <%= t '.name', :name => "#{@invitation_request.name}" %>
+  <%= t '.email', :email => "#{@invitation_request.email}" %>
+  <%= t '.memo', :memo => "#{@invitation_request.memo}" %>
 
-If this is you, visit the URL below to confirm your request and
-display it to other logged-in users.
+<%= t '.warning' %>
 
   <%= Rails.application.root_url %>invitations/confirm/<%= @invitation_request.code %>
 
-If this is not you, you can delete this message.
+<%= t '.deletemessage' %>

config/locales/en.yml

@@ -146,6 +146,15 @@ en:
       title: "Hello %{email},"
       invitedto: "The user %{user} has invited you to %{appname}"
       createaccount: "To accept this invitation and create an account, visit the URL below:"
+  invitation_request_mailer:
+    invitation_request:
+      title: "Hello %{email},"
+      invitedto: "Someone at %{userip} has submitted an invitation request to %{appname}."
+      name: "Name: %{name}"
+      email: "Email: %{email} (won't be displayed to other users)"
+      memo: "Memo: %{memo}"
+      warning: "If this is you, visit the URL below to confirm your request and display it to other logged-in users."
+      deletemessage: "If this is not you, you can delete this message."
   login:
     index:
       login: "Login"

config/locales/fr.yml

@@ -146,6 +146,15 @@ fr:
       title: "Bonjour %{email},"
       invitedto: "L'utilisateur %{user} vous a invité au %{appname}"
       createaccount: "Pour accepter cette invitation et créer votre compte, merci de cliquer sur le lien ci-dessous :"
+  invitation_request_mailer:
+    invitation_request:
+      title: "Bonjour %{email},"
+      invitedto: "Quelqu'un avec l'ip %{userip} a demandé une invitation au %{appname}."
+      name: "Name: %{name}"
+      email: "Email: %{email} (ne sera pas montré aux autres utilisateurs)"
+      memo: "Memo: %{memo}"
+      warning: "Si c'est bien vous, suivez l'URL suivante pour confirmer votre demande et l'afficher aux autres utilisateurs."
+      deletemessage: "S'il ne s'agit pas de vous, vous pouvez effacer ce message."
   login:
     index:
       login: "Se connecter"