Change the introduction and do other minor changes
Change the introduction and do other minor changes

Lightstreamer/Lightstreamer-JMS-example-Portfolio-client-javascript,Weswit/Lightstreamer-JMS-example-Portfolio-client-javascript,Lightstreamer/Lightstreamer-JMS-example-Portfolio-client-javascript,Weswit/Lightstreamer-JMS-example-Portfolio-client-javascript