Update S2InitTwitter.groovy

s2-init-twitter results configs on Config.groovy:
- grails.plugins.springsecurity.twitter.app.consumerKey
- grails.plugins.springsecurity.twitter.app.consumerSecret
and causes "401 Unauthorized" by "Connect with Twitter" button.
the document says:
- grails.plugins.springsecurity.twitter.consumerKey
- grails.plugins.springsecurity.twitter.consumerSecret

scripts/S2InitTwitter.groovy

@@ -59,15 +59,15 @@ private void fillConfig() {
 
     code = "twitter.app.key"
     ant.input(message: "Enter your Twitter API Key", addproperty: code)
-    config['app.key'] = ant.antProject.properties[code]
+    config['key'] = ant.antProject.properties[code]
 
     code = "twitter.app.consumerKey"
     ant.input(message: "Enter your Twitter API Consumer Key", addproperty: code, defaultvalue: config['app.key'])
-    config['app.consumerKey'] = ant.antProject.properties[code]
+    config['consumerKey'] = ant.antProject.properties[code]
 
     code = "twitter.app.consumerSecret"
     ant.input(message: "Enter your Twitter API Consumer Secret", addproperty: code)
-    config['app.consumerSecret'] = ant.antProject.properties[code]
+    config['consumerSecret'] = ant.antProject.properties[code]
 
     def configFile = new File(appDir, 'conf/Config.groovy')
     if (configFile.exists()) {