Concrete-mailer

Changed

- fix mime type when attachments

Changed

- always try to login to SMTP server without checking if server accepts authentication. If an error is raised just pass and do not block connection.

Added

- exclude tests directory when packaging `concrete-mailer`

Added

- added parameter `use_tls`. It allows to activate or not the tls use within smtp connection. Default value is `True` for backward compatibility.
- added the check to ensure the SMTP server supports the auth extension before login

Changed

- change function `get_connection` badly named `sender_email` parameter
- change the sender while sending over SMTP

Removed

- removed unnecessary class EmailToConsole, since standard `smtpd` python module make the job.