Add mobile registration site to fix ugly 500

app/views/registrations/new.mobile.haml

+-#   Copyright (c) 2010-2011, Diaspora Inc.  This file is
+-#   licensed under the Affero General Public License version 3 or later.  See
+-#   the COPYRIGHT file.
+
+= javascript_include_tag "validation"
+
+.stream
+  #login_form
+    .login-container
+      %h2
+        = t('users.getting_started.welcome')
+      = form_for(resource, :as => resource_name, :html => {:class => 'new_user_form'}, :url => registration_path(resource_name), :validate => true) do |f|
+        .row
+          .row
+            = f.label :username, t('username')
+          .centered
+            = f.text_field :username
+            %span.host_uri
+              = "@#{AppConfig[:pod_uri].host}"
+        .row
+          .row
+            = f.label :email, t('email')
+          .centered
+            = f.email_field :email
+        .row
+          .row
+            = f.label :password, t('password')
+          .centered
+            = f.password_field :password
+        .row
+          .row
+            = f.label :password_confirmation, t('password_confirmation')
+          .centered
+            = f.password_field :password_confirmation
+        .row
+          = f.submit t('registrations.new.create_my_account'), :class => 'login-submit'
+          = link_to t('.sign_up'), new_user_session_path()
+
+%footer
+