Moved all templates to subfolders, closes #47

uffd/mail/templates/mail/list.html

uffd/mail/templates/mail/show.html

uffd/mail/views.py

uffd/mfa/templates/mfa/auth.html

uffd/mfa/templates/mfa/disable.html

uffd/mfa/templates/mfa/setup.html

uffd/mfa/templates/mfa/setup_recovery.html

uffd/mfa/templates/mfa/setup_totp.html

uffd/mfa/views.py

uffd/oauth2/templates/oauth2/error.html

uffd/oauth2/templates/oauth2/logout.html

uffd/oauth2/views.py

uffd/role/templates/role/list.html

uffd/role/templates/role/show.html

uffd/role/views.py

uffd/selfservice/templates/selfservice/forgot_password.html

...lfservice/templates/selfservice/mailverification.mail.txt

uffd/selfservice/templates/selfservice/newuser.mail.txt

.../selfservice/templates/selfservice/passwordreset.mail.txt

uffd/selfservice/templates/selfservice/self.html