Lots of new algorithms and cleanups of old ones

[SVN r27579]

src/python/biconnected_components.cpp

@@ -52,6 +52,7 @@ articulation_points(const Graph& g)
 void export_biconnected_components()
 {
   using boost::python::arg;
+  using boost::python::def;
 
   def("biconnected_components", &biconnected_components<Graph>,
       (arg("graph"),