- add flatpages app to gnuviechadmin.settings.base.DJANGO_APPS
- add imprint handling to gnuviechadmin.context_processors.navigation, remove
unused about page handling
- add URL 'imprint' to gnuviechadmin.urls
- replace link 'about' in template base.html with 'imprint'
- add templates for flatpages
- add german translation for imprint and contact navigation links
- implement managemails.forms.ChangeMailboxPasswordForm
- extract code for determining hosting package and customer from URL into
HostingPackageAndCustomerMixin
- implement managemails.views.ChangeMailboxPassword
- add new URL pattern 'change_mailbox_password' to managemails.urls
- add template managemails/mailbox_setpassword.html
- link from template hostingpackages/customerhostingpackage_detail.html to
change_mailbox_password
- add german translation for new strings
- document new feature in changelog