Merge branch 'hotfix/3.5.1'
Fix bug in yet file output
bump version
Song player
Make sure there is only one song playing
Merge branch 'hotfix/songplayer' into develop

Conflicts:
	Alkitab/AndroidManifest.xml
	Alkitab/res/layout/activity_song_view.xml
	Alkitab/src/yuku/alkitab/base/ac/SongViewActivity.java