finished admin/users i18n + dry the admin i18n

app/views/admin/users/index.html.haml

@@ -1,18 +1,16 @@
-- title "Admin/Benutzerinnen"
+- title t '.title'
 
 - content_for :actionbar do
-  = link_to 'Neue Benutzerin anlegen', new_admin_user_path, class: 'btn btn-primary'
+  = link_to t('.new_user'), new_admin_user_path, class: 'btn btn-primary'
 
 - content_for :sidebar do
-  %p
-    Hier kannst du Benutzer_innen #{link_to 'neu Anlegen', new_admin_user_path},
-    bearbeiten und natürlich auch löschen.
+  %p= t('.first_paragraph', url: link_to(t('.new_users'), new_admin_user_path)).html_safe    
 
 .well.well-small
   = form_tag admin_users_path, :method => :get, :remote => true,
     'data-submit-onchange' => true, class: 'form-search' do
     = text_field_tag :user_name, params[:user_name], class: 'input-medium search-query',
-      placeholder: 'Name ...'
+      placeholder: t('admin.search_placeholder')
 
 #users
   = render "users"