fix #1350 by removing admin_email from preferences model and add it as a site option in

site.yml.tmpl. This one needs running migrations

db/migrate/20121223144702_no_default_admin_email.rb

@@ -0,0 +1,9 @@
+class NoDefaultAdminEmail < ActiveRecord::Migration
+  def up
+    remove_column :preferences, :admin_email
+  end
+
+  def down
+    add_column :preferences, :admin_email, :string, {:default => "butshesagirl@rousette.org.uk", :null => false}
+  end
+end