test/graph_test.cc added.
It discovered several bugs and warnings in 'include/smart_graph.h',
in 'include/skeletons/graph.h' and in 'work/alpar/list_graph.h'.
They have also been fixed.

BINARIES = path_test map_test iter_map_test

INCLUDEDIRS= -I. -I.. -I../../include -I../{marci,jacint,alpar,johanna,akos}

include ../makefile