Avoid error when Spree::Config[:auto_capture] is set to true
Merge pull request #13 from supherman/auto-capture

Avoid error when Spree::Config[:auto_capture] is set to true
Merge branch 'master' into complete-payments

* master:
  Avoid error when Spree::Config[:auto_capture] is set to true
Refactor conekta payments, now card payments are completed inmediatly and the order receipt will appear only with bank and cash payments