Here is a subjectively trimmed list of commits for 0.19. Please send
NEWS patches for anything (either your own contributions or those of
others) you think is important to users or downstream developers.

Austin Clements:
      emacs: Clarify that notmuch-poll-script is deprecated
      lib: Invalidate message metadata in _notmuch_message_gen_terms

      new: Report and abort on upgrade failure

      emacs: Improved compatibility for window-body-width in Emacs < 24
      new: Don't report version after upgrade

      lib: Database version 3: Introduce fine-grained "features"
      cli: Be more helpful when .notmuch-config does not exist
      emacs: Fix coding system in `notmuch-show-view-raw-message'
      lib: Simplify close and codify aborting atomic section

      doc: Emacs manual improvements and expansions
      test: Port atomicity test to Python

      lib: Add a ghost messages database feature

David Edmondson (6):
      emacs: Correct the documentation for `notmuch-search-line-faces'.
      emacs: Forwarded messages should not have modified buffers

Ian Main (2):
      VIM: Use notmuch CLI for config
      VIM: Make starting in 'insert' mode for compose optional

Jani Nikula (26):

     emacs: allow functions in notmuch-show-stash-mlarchive-link-alist

      cli/insert: require succesful message indexing for success status
      cli/insert: add post-insert hook

Mark Oteiza (2):
      config: read user.name from $NAME if set
      config: read database.path from $MAILDIR if set

Mark Walters (8):

      dump: make dump take Xapian write lock


Michal Sojka (13):

      cli: search: Add --output={sender,recipients}
      cli: address: Add --output=count

Peter Wang (5):

      python: handle return status of database close and destroy
      go: add return status to database close method
      ruby: handle return status of database close
      cli: refactor insert

Thibaut Horel (1):
      python: Add binding for notmuch_query_add_tag_exclude

Tomi Ollila (9):

      cli: notmuch address option defaults update


Wael M. Nasreddine (2):
      ruby: Add wrapper for notmuch_query_count_threads