Updates font-awesome-rails gem to fix missing carousel button icons
Applies default letter spacing to the whole site
Adds similar recipe list to the Recipe#show page

This is based on a very simple rule for now. It displays the first three
recipes that are of the same category
Adds basic subscription welcome mailer

Also configures sendgrid for running in production
Removed redundant test directory
Adds missing specs to verify that welcome emails sent on subscription
Updates rails and a few other gems to latest
Unsubscribe action and integration tests
Adds UserMailer#newsletter action

Includes rake task to send newsletter to all subscribers
Change to copy on subscription welcome email
Adds recipes to monthly newsletter
Correction to newsletter manager
Remove images from newsletter
Proper feedback messages for subscription form.

Notices need to work with Ajax and handle success and failure cases.
Corrections to specs following copy change
Switch the twitter feed to zanzaneet
Changes email from address to noreply@zanzaneet.com

Was the info mailbox but we want to make it clear that nobody will be
listening if they reply to the automated newsletter or welcome message.
Adds rake tasks for newsletter dry run and preview
First basic passing specs for blog page
Blog link in the main menu