basic support for cloudfoundry.

Add
 - Entry point server.js
 - Load port and mysql configuraion from env variable
 - Tunable polling duration

node/server.js

@@ -419,6 +419,8 @@ async.waterfall([
     //this is only a workaround to ensure it works with all browers behind a proxy
     //we should remove this when the new socket.io version is more stable
     io.set('transports', ['xhr-polling']);
+
+    io.set('polling duration', settings.pollingDuration)
     
     var socketIOLogger = log4js.getLogger("socket.io");
     io.set('logger', {