add stats sever

* add stats sever

* remove stats staging url

lib/config.js

@@ -25,15 +25,21 @@ var SUGAR_HOSTS = {
   staging: 'https://notifications-staging.zooniverse.org',
 };
 
+var STAT_HOSTS = {
+  production: 'https://stats.zooniverse.org'
+};
+
 var hostFromBrowser = locationMatch(/\W?panoptes-api-host=([^&]+)/);
 var appFromBrowser = locationMatch(/\W?panoptes-api-application=([^&]+)/);
 var talkFromBrowser = locationMatch(/\W?talk-host=([^&]+)/);
 var sugarFromBrowser = locationMatch(/\W?sugar-host=([^&]+)/);
+var statFromBrowser = locationMatch(/\W?stat-host=([^&]+)/);
 
 var hostFromShell = process.env.PANOPTES_API_HOST;
 var appFromShell = process.env.PANOPTES_API_APPLICATION;
 var talkFromShell = process.env.TALK_HOST;
 var sugarFromShell = process.env.SUGAR_HOST;
+var statFromShell = process.env.STAT_HOST;
 
 var envFromBrowser = locationMatch(/\W?env=(\w+)/);
 var envFromShell = process.env.NODE_ENV;
@@ -50,6 +56,7 @@ module.exports = {
   clientAppID: appFromBrowser || appFromShell || API_APPLICATION_IDS[env],
   talkHost: talkFromBrowser || talkFromShell || TALK_HOSTS[env],
   sugarHost: sugarFromBrowser || sugarFromShell || SUGAR_HOSTS[env],
+  statHost: statFromBrowser || statFromShell || STAT_HOSTS[env],
   oauthHost: OAUTH_HOSTS[env],
 };