Overview

API:
	{HOST}/api/{username}/(today|tommorrow|nowterm).json[?callback={func}]
	example: http://kb.gongda.tk/api/gao/today.json
			 http://kb.gongda.tk/api/gao/tommorrow.json?callback=f
			 http://kb.gongda.tk/api/gao/nowterm.json