deadbeef is checked to ensure it's running before doing anything,
otherwise a lot of useless data is pulled in, and the if statement to
check whether or not the player is stopped is now integrated into the
query at startup instead of running a separate query every time.
This is added with the tf_format config, which will override format if
it is set. This makes the call "deadbeef --nowplaying-tf <tf_format>"
and displays the output directly. This output should now also support
unicode, regardless of Python version.
There is also the tf_format_if_stopped, a boolean config that
configures whether or not the tf_format output should be displayed
even if deadbeef isn't playing anything.
