These functions now support completion tags for query parts
starting with "tag:".
+Turn "id:MSG-ID" links into buttons associated with notmuch searches
+
+ Text of the form "id:MSG-ID" in mails is now a clickable button that
+ opens a notmuch search for the given message id.
+
Performance
-----------
notmuch_database_begin_atomic and notmuch_database_end_atomic allow
multiple database operations to be performed atomically.
-
notmuch_database_find_message_by_filename does exactly what it says.
API changes