This patch allows the notmuch backend to retrieve the notmuch database path from the notmuch configuration file in case no "db_path" argument is passed to the Notmuch constructor.
In such a case, i3pystatus will try to load the file designed by the
environment variable NOTMUCH_CONFIG and "~/.notmuch_config". and
retrieve the value "path" of the section [database].
Merge pull request #109 from teto/notmuch_autoload

This patch allows the notmuch backend to retrieve the notmuch database p...