Add unsubscribe field for admin emails

This will completely unsubscribe you from any admin emails

db/migrate/20140811083829_add_unsubscribed_at_field_to_users.rb

+class AddUnsubscribedAtFieldToUsers < ActiveRecord::Migration
+  def change
+    add_column :users, :admin_email_unsubscribed_at, :datetime
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20140611135229) do
+ActiveRecord::Schema.define(version: 20140811083829) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -366,6 +366,7 @@ ActiveRecord::Schema.define(version: 20140611135229) do
     t.string   "unconfirmed_email"
     t.boolean  "hide_no_ssh_key",             default: false
     t.string   "website_url",                 default: "",    null: false
+    t.datetime "admin_email_unsubscribed_at"
   end
 
   add_index "users", ["admin"], name: "index_users_on_admin", using: :btree