add NCUT for spectral clustering
Merge branch 'master' of https://github.com/gugugupan/LabelTree

Conflicts:
	Ncut_9/ICgraph.m
	Ncut_9/NcutImage.m
	Ncut_9/X2distances.m
	Ncut_9/a_times_b_cmplx.cpp
	Ncut_9/affinityic.cpp
	Ncut_9/build_scene.m
	Ncut_9/cimgnbmap.cpp
	Ncut_9/compileDir_simple.m
	Ncut_9/computeEdges.m
	Ncut_9/computeW.m
	Ncut_9/compute_relation.m
	Ncut_9/compute_relation2.m
	Ncut_9/demoNcutClustering.m
	Ncut_9/demoNcutImage.m
	Ncut_9/discretisation.m
	Ncut_9/discretisationEigenVectorData.m
	Ncut_9/doog1.m
	Ncut_9/doog2.m
	Ncut_9/fft_filt_2.m
	Ncut_9/gaussian.m
	Ncut_9/imread_ncut.m
	Ncut_9/jpg_images/._1.jpg
	Ncut_9/jpg_images/._2.jpg
	Ncut_9/jpg_images/._3.jpg
	Ncut_9/jpg_images/._Thumbs.db
	Ncut_9/jpg_images/1.jpg
	Ncut_9/jpg_images/2.jpg
	Ncut_9/jpg_images/3.jpg
	Ncut_9/jpg_images/Thumbs.db
	Ncut_9/make_filterbank_even2.m
	Ncut_9/make_filterbank_odd2.m
	Ncut_9/mex_w_times_x_symmetric.cpp
	Ncut_9/ncut.m
	Ncut_9/ncutW.m
	Ncut_9/quadedgep.m
	Ncut_9/showmask.m
	Ncut_9/sparsifyc.cpp
	Ncut_9/spmtimesd.cpp
	initialize_tree.m