added URL
added URL

Re: issue #41
wangjun/randomColor,guillermoandrae/randomColor,tricialing/randomColor,haolee1990/randomColor,mcanthony/randomColor,grandsong/randomColor,2947721120/Random-Color,mcanthony/randomColor,daviesgeek/randomColor,grandsong/randomColor,tricialing/randomColor,daviesgeek/randomColor,ahmadruhaifi/randomColor,rstr74/randomColor,manuelWeb/randomColor,guillermoandrae/randomColor,nathanielcollum/randomColor,2947721120/Random-Color,abhishekbhalani/randomColor,ganlanyuan/randomColor,abhishekbhalani/randomColor,nathanielcollum/randomColor,ganlanyuan/randomColor,ahmadruhaifi/randomColor,rstr74/randomColor,manuelWeb/randomColor,wangjun/randomColor,haolee1990/randomColor,davidmerfield/randomColor