log emails which are sent on dev-server

better style to see what will happen in production and also nice for trying sign up / pw reset / email change token emails.
could also use this style, which would workaround the `.replace('  ', '')`...
```python
    logging.info(
      '\n'
      '######### Deferring an Email ##########################################'
      '\nFrom: %s\nTo: %s\nSubject: %s\n\n%s\n'
      '#######################################################################'
      % (sender, to or sender, subject, body,)
    )
```
 or use [`textwrap.dedent`](https://docs.python.org/2/library/textwrap.html#textwrap.dedent)?

which do you like most?