Fix #233 [V3] Reading wrong "music_directory" key from mpd.config.

Fix #233 [V3] Reading wrong "music_directory" key from mpd.config.

Testing an initalizer seems kinda weird almost like what is there is in the wrong place. I used these strings for testing locally.

```
#music_directory        "~/music1111"
#  music_directory        "~/music"
 music_directory "/some-dir-but-not-the-last-declaration"
music_directory "/the-dir-were-looking-for"
 some other crap
```