add codecov

Author: stephengroat

spec/spec_helper.rb

@@ -1,3 +1,10 @@
+require 'simplecov'
+SimpleCov.start
+if ENV['CI'] == 'true'
+  require 'codecov'
+  SimpleCov.formatter = SimpleCov::Formatter::Codecov
+end
+
 $LOAD_PATH << File.join(File.dirname(__FILE__), '..', 'lib')
 
 require 'rubygems'