Merge pull request #1 from bitmazk/master

Sync remote
Try to get the email address from guest customers (=not logged in users).
Merge branch 'master' of https://github.com/philippeowagner/django-shop-simplenotifications
Fixed indentation error.
Fixed wrong import (util, not utils).
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Updated README due to issue #5.
Only send to the billing address. Updated README. Removed debug code.
Reworked README.
Merge pull request #6 from philippeowagner/master

Sending confirmation email works now also for guest customers.