Send email when user requests app public #332
Add new line to email #332
Feature/email app public #354

Add attachment
Request for app to be public #332

Email template
Feature/email app public #354

Test fix
Email when user requests app to be public #332

Expand content of email
Merge branch 'devel' into feature/email-app-public

Conflicts:
	spec/features/doorkeeper/manage_apps_spec.rb
Merge branch 'feature/contact-email-template' into feature/email-app-public
Feature/email app public #354

Use mailers/notification_template for email
Merge branch 'devel' into feature/email-app-public
Feature/email app public #354

Test update
Merge branch 'devel' into feature/email-app-public
Clean up mailers

Instead of creating a new mailer for every single action,
consolidate mailers into common functionality.

A base MyusaMailer includes the logo image
in each email; the other mailers inherit from it.

Contact and App Public notifications are now part of the
SystemMailer

SystemMailer and NotificationMailer share the same layout.

The layout includes all the standard fields now, with the partials
implementing the specific body content for those emails.

A @metadata local is now defined and used by the notification
template to populate common fields, like the title.

Moved strings into the translation/locale file.
Merge pull request #354 from 18F/feature/email-app-public

Feature/email app public