[NF] Sending information about updated billig details
[HK] Stray comment
[CR/BF] Improve billing detail change notifications
[CR/BF] Improve billing detail change notifications (more)
Merge branch 'im-review'

Conflicts:
	application/controllers/CustomerController.php
	application/views/customer/forms/billing-registration.phtml
Update changelog
Spelling
Version bump
[NF] Customer filtered by IXP list
Merge branch 'master' into im-customer-ixps