marci [Fri, 16 Jan 2004 11:20:09 +0000] rev 15
new method for making invalid iterators: make_invalid()
marci [Mon, 12 Jan 2004 11:50:52 +0000] rev 14
reimplemented max_flow algorithm class with bfs_iterator1
marci [Mon, 12 Jan 2004 11:49:56 +0000] rev 13
b_node bug correction