Added a way to close the currently open game, to ease transition to multiple games running at once

pygo.py

@@ -24,7 +24,7 @@ class Pygo():
         self.our_color = None
 
         self.init_user_interface('./ui/default.glade')
-        self._init_widgets()
+        self.init_widgets()
 
 
     def init_user_interface(self, path_to_skin):
@@ -34,18 +34,22 @@ class Pygo():
         self.contents = self.tree.get_widget('main_box')
 
 
-    def _init_widgets(self):
+    def init_widgets(self):
         self.window.resize(1000,800)
         self.gogame = None
         # gobject.timeout_add(1000, self.update)
 
 
+    def on_game_close(self, widget):
+        print 'Pygo.on_game_close(): stub'
+
+
     def on_local_new(self, widget):
         if self.gogame:
             self.contents.remove(self.gogame)
-            del self.gogame
+            self.gogame = None
         if self.goban:
-            del self.goban
+            self.goban = None
 
         self.goban = goban.Goban()
         self.network_mode = False