Migrate to rails 4.0.4
Merge branch 'master' into migrate-to-rails4

* master:
  5.0.0
  We want Ruby 1.9 syntax
  new settings
  More elegant error logging and method exit
  Extracted .log_sendgrid_error
  Logging SendGrid errors
ignoring patch number
Merge pull request #12 from Soluciones/migrate-to-rails4

Migrate to rails4