new file:   base/dsalgo/bitmap.cc
	new file:   base/dsalgo/bitmap.h
	new file:   base/dsalgo/nbitmap.cc
	new file:   base/dsalgo/nbitmap.h
	new file:   base/dsalgo/skiplist.cc
	new file:   base/dsalgo/skiplist.h
	new file:   base/dsalgo/stack.cc
	new file:   base/dsalgo/stack.h
	new file:   base/dsalgo_test/bitmap_test.cc
	new file:   base/dsalgo_test/nbitmap_test.cc
	new file:   base/dsalgo_test/skiplist_test.cc
	new file:   base/dsalgo_test/stack_test.cc
	modified:   base/dsalgo_test/Makefile
	modified:   base/dsalgo_test/Makefile