Changed the names of the unit test cpps and added files so that the
compiler has something to compile, changed the makefile accordingly.
 On branch master
 Changes to be committed:
	new file:   darray.cpp
	renamed:    utest_darray.cpp -> darray_utest.cpp
	new file:   deque.cpp
	new file:   deque_utest.cpp
	new file:   dllist.cpp
	renamed:    utest_dllist.cpp -> dllist_utest.cpp
	modified:   makefile