Added actions for play and pause
added volume attribute
Volume change action
Update README.md
minor changes
Merge branch 'development' of github.com:Tom-Jans/pimatic-mpd into development
added the volume change listener
Merge pull request #2 from Tom-Jans/development

MPD actions
remove npm generated stuff from package.json, added @Tom-Jans to contributors
0.8.2