Updated cover image
Merge branch 'master' of github.com:conekta/conekta-magento

# By MauricioMurga (6) and Rich Peniche (2)
# Via MauricioMurga
* 'master' of github.com:conekta/conekta-magento:
  add support to magento 1.9.0.1
  add support to magento 1.9.0.1
  update version and changelog
  update obsever logic to support virtual products
  Update README.md
  Updated Copyright.
  update changelog
  fix email notifications and offline payment order status