[PATCH] emacs: Add `notmuch-show-stash-gmane' and `notmuch-show-stash-gmane-and-go'.

[Pieter Praet]

v6:
- Rebased to current master (be851ad3).
- Broke test out into a separate commit.

v5:
- id:"1327907574-12760-1-git-send-email-pieter at praet.org"
- id:"1327907574-12760-2-git-send-email-pieter at praet.org"

v4:
- id:"1327653866-30084-1-git-send-email-pieter at praet.org"

v3:
- id:"1327583610-30085-1-git-send-email-pieter at praet.org"

v2:
- id:"1327452608-8247-1-git-send-email-pieter at praet.org"

v1: (dme)
- id:"1327397873-20596-1-git-send-email-dme at dme.org"


Peace