This module will try to launch a new mpd server for testing purposes. This
mpd server will then be used during POE::Component::Client::MPD
or Audio::MPD tests.

In order to achieve this, the module will create a fake _mpd.conf_ file
with the correct paths (ie, where you untarred the module tarball). It
will then check if some mpd server is already running, and stop it if the
'MPD_TEST_OVERRIDE' environment variable is true (die otherwise). Last it
will run the test mpd with its newly created configuration file.

Everything described above is done automatically when the module is
'use'-d.