Add notification mailer with shipped action
Mail the user when a pod is shipped
Add welcome notification
Send welcome email on signup

Resolves #62
Add email_spec for testing emails
Add tests for shipments and emails
Add tests for welcome email

Should only be created when the first pending payment is set up
bcc admin on all notifications
Avoid test flicker by waiting for ajax action to happen
Generate HTML coverage as well as pushing to coveralls

Also DRYed up simplecov config
Use poltergeist direct from github to try to fix travis build
Merge branch 'refs/heads/master' into notification-mailer

Conflicts:
	Gemfile.lock
Merge pull request #89 from seedpod/notification-mailer

Notification mailer