OTHER: rename 'lib' directory to 'backend_xmmsclient++'

I plan to replace the boost based c++ bindings with native Qt based bindings
in the long run
The currently there is libxmms2qt, but tru stated working on bindings based
on genipc

lib/debug.h

@@ -1,28 +0,0 @@
-/** 
- *  This file is a part of Esperanza, an XMMS2 Client.
- *
- *  Copyright (C) 2007 XMMS2 Team
- *
- *  This program is free software; you can redistribute it and/or
- *  modify it under the terms of the GNU General Public License
- *  as published by the Free Software Foundation; either version 2
- *  of the License, or (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- */
-
-// Usage: include it and then just do a DBGOUT("bla foo bar " << variable << " is awesome.");
-// while in debug mode, it will all be print to console. In release mode, DBGOUT does nothing
-
-#ifndef __DEBUG_H__
-#	define __DEBUG_H__
-#	ifdef _DEBUG
-#		include <QDebug>
-#		define	DBGOUT(a) qDebug () << QString(__FILE__ ":%1").arg(__LINE__) << "[" << __func__ << "] -" << a
-#	else
-#		define DBGOUT(a)
-#	endif
-#endif