add coveralls back

Author: Judahmeek

spec/rails_helper.rb

@@ -1,5 +1,7 @@
 # This file is copied to spec/ when you run "rails generate rspec:install"
 ENV["RAILS_ENV"] ||= "test"
+require "coveralls"
+Coveralls.wear!("rails") # must occur before any of your application code is required
 require "spec_helper"
 require File.expand_path("../../config/environment", __FILE__)