Give access to the entity map.

This allows accessing the list of entities instanciated in the dynamic-graph.

src/dynamic-graph-py.cc

@@ -59,6 +59,7 @@ namespace dynamicgraph {
 
     namespace factory {
       extern PyObject* getEntityClassList(PyObject* self, PyObject* args);
+      extern PyObject* getEntityMap(PyObject* self, PyObject* args);
     }
     namespace signalCaster {
       extern PyObject* getSignalTypeList(PyObject* self, PyObject* args);

src/factory-py.cc

@@ -51,6 +51,7 @@ namespace dynamicgraph {
 
 	return Py_BuildValue("O", classTuple);
       }
+
       
     } // namespace factory
   } // namespace python