[notmuch] [PATCH v2] notmuch.el: Make notmuch-show buffer name first subject, instead of thread-id

[Sebastian Spaeth]

May I propose this patch for fast-track inclusion? It makes notmuching
much more pleasantly. Thanks for that patch. 

Sebastian

ps. if someone could propose a strategy for a "forward to next unread
message" keybinding in a thread, I would be (nearly) completely happy :).

pps. I included this one in my feature-all branch.