Force long polling in jabbr

gistfile1.js

                transport = $.cookie('jabbr.transport'),
                options = {};

            if (transport) {
                options['transport'] = transport;
            }
+           else
+               options['transport'] = 'longPolling';

            connection.hub.logging = logging;

            connection.hub.start(options, function () {
                chat.server.join()
                .fail(function (e) {