response data to JSON string, commonJS modules

 Lab4 keypoints : fs.readFile('./data.csv', 'utf-8', function(err,
data){};

response.writeHead(200, {
            'Content-Type':'application/json'
        });

Lab5 : keypoints
module.exports = Person;

exports.Person = Person;
exports.info = function(){};
var srikant = new Person.Person({});