phantomjs install: http://www.ryanbridges.org/2013/05/21/putting-the-flash-back-in-phantomjs/
Usage of ./screenShot:
-debug=false: Open debug mode (default: false)
-delay=1: Delay second before shot (default: 1)
-height=768: Screen height (default: 768)
-port=9464: TCP port number to listen on (default: 9464)
-width=1024: Screen width (default: 1024)