把PlayControlor分离出来
Merge branch 'master' of https://github.com/zihuyishi/MusicPlayer

Conflicts:
	PlayerCore/PlayerCore/MusicList.cs
	PlayerCore/PlayerCore/obj/x86/Debug/PlayerCore.csprojResolveAssemblyReference.cache
	PlayerCore/testPlayCore/Form1.cs
	PlayerCore/testPlayCore/bin/x86/Debug/APlayer.exe
	PlayerCore/testPlayCore/obj/x86/Debug/APlayer.exe