Graph and UndirGraph concept modifications.
* For incidence iterators ({In,Out,Inc}EdgeIt) there is now baseNode and
runningNode functions in graph interface
* For Edge in undir graphs: Edge(UndirGraph const &, UndirEdge, Node)
constructor. Same for IncEdgeIt
* Edge(UndirEdge, bool) constructor is no more in the public interface. (But we
need it in the developpers interface).
1 * ValueType -> Value, KeyType -> Key, ReferenceType ->Reference,
3 * target() -> target(), source() -> source()
5 * Right include paths in documentation
7 2004-09-30 Alpar Juttner <alpar@cs.elte.hu>