Update README with badges, setup coveralls

Gemfile

@@ -5,7 +5,9 @@ gemspec
 group :development, :test do
   gem 'rake'
   gem 'guard-rspec'
-  gem 'simplecov', require: false, platforms: :mri
+  gem 'simplecov', require: false
+  gem 'coveralls', require: false
+
   gem 'activerecord', '~> 4.1'
   gem 'ox', '>= 2.1.2', platforms: [:mri, :rbx]
 end

README.md

@@ -1,6 +1,12 @@
-# SAX Machine [![Build Status](https://secure.travis-ci.org/pauldix/sax-machine.png?branch=master)](http://travis-ci.org/pauldix/sax-machine)
+# SAX Machine
 
-[Wiki](https://github.com/pauldix/sax-machine/wiki)
+## Status
+
+[![Gem Version](https://badge.fury.io/rb/sax-machine.svg)](http://badge.fury.io/rb/sax-machine)
+[![Build Status](https://secure.travis-ci.org/pauldix/sax-machine.svg?branch=master)](http://travis-ci.org/pauldix/sax-machine?branch=master)
+[![Coverage Status](https://img.shields.io/coveralls/pauldix/sax-machine.svg)](https://coveralls.io/r/pauldix/sax-machine?branch=master)
+[![Code Climate](https://img.shields.io/codeclimate/github/pauldix/sax-machine.svg)](https://codeclimate.com/github/pauldix/sax-machine)
+[![Dependencies](https://gemnasium.com/pauldix/sax-machine.svg)](https://gemnasium.com/pauldix/sax-machine)
 
 ## Description
 

spec/spec_helper.rb

@@ -1,5 +1,12 @@
 begin
   require 'simplecov'
+  require 'coveralls'
+
+  SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter[
+    SimpleCov::Formatter::HTMLFormatter,
+    Coveralls::SimpleCov::Formatter
+  ]
+
   SimpleCov.start do
     add_filter '/spec/'
   end