Fix classes
Merge branch 'master' of https://github.com/masakihirokawa/objc-classes-dc-audio-player

Conflicts:
	DCAudioPlayerSample/DCAudioPlayerSample.xcodeproj/project.pbxproj
	DCAudioPlayerSample/DCAudioPlayerSample/Classes/DCAudioPlayer.h
	DCAudioPlayerSample/DCAudioPlayerSample/Classes/DCAudioPlayer.m
	DCAudioPlayerSample/DCAudioPlayerSample/ViewController.m
Fix