update filename comments and guards

Core/Beam/FootprintGauss.h

Core/Beam/FootprintSquare.h

Core/Detector/ConvolutionDetectorResolution.h

Core/Detector/Convolve.h

Core/Detector/DetectionProperties.h

Core/Detector/DetectorContext.h

Core/Detector/DetectorFunctions.h

Core/Detector/DetectorMask.h

Core/Detector/IDetector.h

Core/Detector/IDetector2D.h

Core/Detector/IDetectorResolution.h

Core/Detector/IResolutionFunction2D.h

Core/Detector/IsGISAXSDetector.h

Core/Detector/RectangularDetector.h

Core/Detector/RegionOfInterest.h

Core/Detector/ResolutionFunction2DGaussian.h

Core/Detector/ScanResolution.h

Core/Detector/SpecularDetector1D.h

Core/Detector/SphericalDetector.h

Core/HardParticle/FormFactorHollowSphere.h