bug fixes. 
1)Don't let to add already existing track. 

2)Search and connectivity listeners protected from initial call, couze
fucking asshole android calls a listener when registering it, even if
the event did not occurre...
lanscape mode improved, but not finished.
Merge branch 'master' of https://github.com/arvurb/jPlay.git

Conflicts:
	src/com/jplay/musicplayer/PlayListActivity.java