support versioning
	modified:   COMMAND.txt
	new file:   densetraj_extract_mbh.log
	modified:   densetraj_select_features.m
	modified:   log/densetraj_select_features.log
	modified:   log/do_clustering_gmm.log
	modified:   log/mfcc_encode_home.log
	modified:   log/mfcc_select_features.log
modified:   log/sift_select_features.log
	modified:   set_global_config.m
	modified:   sift_select_features.m