use callback functions instead of one giant switch/case
simplify song view updater
separate song view and controller
separate playlist controller
implement playlist view controller
add service Makefile and documentation
Merge pull request #2 from haggl/deployment

add service Makefile and documentation
Merge pull request #3 from haggl/callbacks

use callback functions instead of one giant switch/case
Merge pull request #5 from haggl/master

updated version of mpd.class.php
minor layout changes
layout changes