Add new functions

Add new functions
	modified:   hostdepend/X86MAC64/bin/X86MAC64/mrcImageEdgeEnhancement
	modified:   hostdepend/X86MAC64/bin/X86MAC64/mrcImageSmoothing

	modified:   include/lmrcImageEdgeEnhancement.h

  Add Negative Laplacian
	modified:   src/Objects/DataManip/mrcImage/src/lmrcImageEdgeEnhancement.c
	modified:   src/Objects/DataManip/mrcImage/src/lmrcImageEdgeEnhancement.h
	modified:   src/Objects/DataManip/mrcImage/src/lmrcImageNegativeLaplacian.c

  Add Weighted Mean Filter
	modified:   src/Objects/DataManip/mrcImage/src/lmrcImageSmoothing.c