'move IObservableTool interface to AsgAnalysisInterfaces package' (PATInterfaces-00-00-38)

        * relocated IObservableTool interface to PhysicsAnalysis/Interfaces/AsgAnalysisInterfaces
        * Tagging PATinterfaces-00-00-38

PhysicsAnalysis/AnalysisCommon/PATInterfaces/PATInterfaces/IObservableTool.h

-// Dear emacs, this is -*- c++ -*-
-// $Id: IObservableTool.h $
-#ifndef PATINTERFACES_IOBSERVABLETOOL_H
-#define PATINTERFACES_IOBSERVABLETOOL_H
-
-// System include(s):
-
-// Framework include(s):
-#include "AsgTools/IAsgTool.h"
-
-// Forward declaration
-namespace xAOD{
-  class IParticle;
-}
-
-
-/// Interface for tools that want to calculate a quantity
-/// from an xAOD::IParticle
-/// @author Karsten Koeneke <karsten.koeneke@cern.ch>
-///
-class IObservableTool : public virtual asg::IAsgTool {
-
-  /// Declare the interface that this class provides
-  ASG_TOOL_INTERFACE( IObservableTool )
-
- public:
-
-  /// Virtual destructor
-  virtual ~IObservableTool(){};
-
-  /// returns: the value that was calculated from the xAOD::IParticle
-  virtual double
-  evaluate( const xAOD::IParticle* ) const = 0;
-
- }; // class IObservableTool
-
-
-#endif // PATINTERFACES_IOBSERVABLETOOL_H