Refactor player with service and fix the issue that played time is not right.
Merge branch 'master' of https://github.com/awind/DRadio

Conflicts:
	app/src/main/java/com/awind/dradio/activity/PlayActivity.java
	app/src/main/java/com/awind/dradio/musicUtils/DoubanPlayer.java
	app/src/main/java/com/awind/dradio/musicUtils/TrackUtils.java
	app/src/main/java/com/awind/dradio/netUtils/DataFetcher.java
	app/src/main/java/com/awind/dradio/service/MusicPlayService.java