change update notification message
change update notification subject and header
default: subject is part of the params passed on I18n
pass the update_id into mail_params
use apply scopes to filter on adm/projects
remove default: subject from notification_mailer we have all subject and headers on notification.yml
fix specs
Merge pull request #233 from devton/change_update_notification_text

Change update notification text and fix a bug on adm/projects