Merge pull request #1889 from invisibleroads/patch-3

Reconnect when the websocket connection closes unexpectedly.

Closes  #1577.

IPython/frontend/html/notebook/static/js/kernel.js

@@ -98,9 +98,8 var IPython = (function (IPython) {
             " or if the url does not look right, there could be an error in the" +
             " server's configuration.";
         } else {
-            msg = "Websocket connection closed unexpectedly." +
-            " The kernel will no longer be responsive.";
-        }
+ 	    this.start_channels();
+ 	}
         var dialog = $('<div/>');
         dialog.html(msg);
         parent_item.append(dialog);