[PATCH] cli: add a tool for starting new message in the emacs ui

[David Bremner]

David Bremner <david at tethera.net> writes:

> From: Jani Nikula <jani at nikula.org>
>
> Add a tool to start composing an email in the Notmuch Emacs UI with
> the specified subject, recipients, and message body.

Both Jani and Tomi expressed, if not satisfaction, at least exhaustion
with this version, so I pushed to master.

d