Added playlists support

Conflicts:
	main/src/org/musicpd/android/fragments/FSFragment.java
fixed context menu actions

Conflicts:
	JMPDComm/src/org/a0z/mpd/MPD.java
Fixed Playlist name displaying
Merge pull request #299 from psergy/master

Support CUE and other playlists from filesystem tree

Resolved conflict between independently implemented natural/version sort algorithms.