add karma, requirejs, karma-requirejs, phantomjs and karma-phantomjs-launcher to package.json
add main.js to start server
remove karma, requirejs and phantomjs stuff from devDependencies
remove karma.conf.js and test-main.js
switch main file in package.json to main.js
update Testing part in README
add express to dependencies
use express.js in server.js
add test to show how to test the content of the response body
add index.html example
serve the index.html instead of the hello string
refactor test_server.js
add socket.io to dependencies