be-handle-mail succesfully sends replies.

be-handle-mail succesfully sends replies.

Although I'm not catching stdout/stderr yet, so the replies aren't
very useful ;).  Still it the send_pgp_mime.py interface is working :).

I've added rudimentary logging (via LOGFILE) to keep track of what
be-handle-mail is up to.  There's also BE_DIR, which sets the
directory that BE lives in (important ;).

The author handling got more consistent, thanks to
send_pgp_mime.source_email (using the new return_realname option) and
email.utils.formataddr().  Now author_addr should look the same
regardless of which phrasing you use to set it (e.g. "NAME <ADDR>" vs
"ADDR (NAME)", and possibly others.)