[PATCH 0/2]: emacs: Improve notmuch-help

[Nelson Elhage]

This patch set makes notmuch-help integrate with the built-in emacs
help system, resulting in behaviors more familiar and more natural to
most emacs users.

If other people preferred the old behavior of *notmuch-help* buffers
that kept spawning new buffers every time you hit '?', they should
speak up, but as long long-time emacs user, I find this behavior much
more preferable.