Add annotate_rb gem and annotate all models

test/fixtures/users.yml

@@ -1,5 +1,21 @@
 <% password_digest = BCrypt::Password.create("password") %>
 
+# == Schema Information
+#
+# Table name: users
+#
+#  id              :integer          not null, primary key
+#  admin           :boolean          default(FALSE), not null
+#  email_address   :string           not null
+#  password_digest :string           not null
+#  username        :string
+#  created_at      :datetime         not null
+#  updated_at      :datetime         not null
+#
+# Indexes
+#
+#  index_users_on_email_address  (email_address) UNIQUE
+#
 one:
   email_address: one@example.com
   password_digest: <%= password_digest %>