Allow notification email to be set separately from primary email.

CHANGELOG

app/controllers/admin/users_controller.rb

app/controllers/profiles/emails_controller.rb

app/controllers/profiles/notifications_controller.rb

app/mailers/emails/profile.rb

app/mailers/emails/projects.rb

app/mailers/notify.rb

app/models/user.rb

app/views/profiles/emails/index.html.haml

app/views/profiles/notifications/show.html.haml

db/migrate/20150206222854_add_notification_email_to_user.rb

db/schema.rb

spec/mailers/notify_spec.rb