v0.12.0

• mq-mail: provide (very limited) replacement for /usr/bin/mail
• mq-sendmail now also supports -t/--read-recipients
• avoid warnings when executing mq-run when the queue folder was missing some maildir subdirectories (5ccb66d)
• Simplify logging of email deliveries when using the CLI tools mq-run, mq-mail, ... (ae12b28)