implement mail address deletion

- implement managemails.views.DeleteMailAddress
- add get_context_data to AddMailAddress to add customer to template context
- add URL pattern 'delete_mailaddress' to managemails.urls
- add template hostingpackages/customerhostingpackage_detail.html
- add entry to changelog

gnuviechadmin/managemails/urls.py

@@ -11,6 +11,7 @@ from .views import (
     AddMailAddress,
     ChangeMailboxPassword,
     CreateMailbox,
+    DeleteMailAddress,
 )
 
 urlpatterns = patterns(
@@ -21,4 +22,7 @@ urlpatterns = patterns(
         ChangeMailboxPassword.as_view(), name='change_mailbox_password'),
     url(r'^(?P<package>\d+)/mailaddress/(?P<domain>[\w0-9-.]+)/create$',
         AddMailAddress.as_view(), name='add_mailaddress'),
+    url(r'^(?P<package>\d+)/mailaddress/(?P<domain>[\w0-9-.]+)/(?P<pk>\d+)'
+        r'/delete$',
+        DeleteMailAddress.as_view(), name='delete_mailaddress'),
 )