forward slot -> disconnect

src/nett-python/nett-python.cpp

@@ -55,6 +55,11 @@ public:
         slot_->connect( endpoint, slot_tag );
     }
 
+    void disconnect( std::string const & endpoint, std::string const & slot_tag )
+    {
+        slot_->disconnect( nett::slot_address( endpoint, slot_tag ) );
+    }
+
     std::string receive()
     {
 		event_type message;