Add Coveralls for code coverage reporting

Gemfile

@@ -3,6 +3,7 @@ source 'https://rubygems.org'
 gem 'rake'
 
 group :test do
+  gem 'coveralls', :require => false
   gem 'rspec', '>= 2.11'
   gem 'simplecov', :require => false
 end

README.md

@@ -1,14 +1,16 @@
-# delayed_job Mongoid backend
+# DelayedJob Mongoid backend
 
 [![Gem Version](https://badge.fury.io/rb/delayed_job_mongoid.png)][gem]
 [![Build Status](https://secure.travis-ci.org/collectiveidea/delayed_job_mongoid.png?branch=master)][travis]
 [![Dependency Status](https://gemnasium.com/collectiveidea/delayed_job_mongoid.png?travis)][gemnasium]
 [![Code Climate](https://codeclimate.com/github/collectiveidea/delayed_job_mongoid.png)][codeclimate]
+[![Coverage Status](https://coveralls.io/repos/collectiveidea/delayed_job_mongoid/badge.png?branch=master)][coveralls]
 
 [gem]: https://rubygems.org/gems/delayed_job_mongoid
 [travis]: http://travis-ci.org/collectiveidea/delayed_job_mongoid
 [gemnasium]: https://gemnasium.com/collectiveidea/delayed_job_mongoid
 [codeclimate]: https://codeclimate.com/github/collectiveidea/delayed_job_mongoid
+[coveralls]: https://coveralls.io/r/collectiveidea/delayed_job_mongoid
 
 ## Requirements
 

spec/helper.rb

@@ -1,9 +1,11 @@
-unless ENV['CI']
-  require 'simplecov'
-  SimpleCov.start do
-    add_filter 'spec'
-  end
-end
+require 'simplecov'
+require 'coveralls'
+
+SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter[
+  SimpleCov::Formatter::HTMLFormatter,
+  Coveralls::SimpleCov::Formatter
+]
+SimpleCov.start
 
 require 'rspec'
 require 'delayed_job_mongoid'