introduced jquerymobile

- renamed web.js to webserver.js
- created a public directory to hold the index.html file with the
querymobile content
- now when someone queries http://localhost:5000 node will point them
to the index.html, and in intern the index .html will render html
contents + call an ajax function that queries the server url
http://localhost:5000/welcome
- the /welcome url returns a JSON dataset containing 2 items
- the webpage pops up with an object array containing 2 items