hacker-news: use new hackernews api on firebase.
hacker-news: use new hackernews api on firebase.

AlexIljin/factor,mrjbq7/factor,slavapestov/factor,factor/factor,bjourne/factor,nicolas-p/factor,tgunr/factor,slavapestov/factor,AlexIljin/factor,bpollack/factor,bpollack/factor,factor/factor,bpollack/factor,factor/factor,mrjbq7/factor,AlexIljin/factor,bpollack/factor,bjourne/factor,bjourne/factor,bpollack/factor,bjourne/factor,slavapestov/factor,nicolas-p/factor,nicolas-p/factor,factor/factor,nicolas-p/factor,slavapestov/factor,slavapestov/factor,bjourne/factor,bpollack/factor,AlexIljin/factor,slavapestov/factor,mrjbq7/factor,bpollack/factor,nicolas-p/factor,slavapestov/factor,bjourne/factor,bjourne/factor,tgunr/factor,AlexIljin/factor,tgunr/factor,mrjbq7/factor,tgunr/factor,factor/factor,mrjbq7/factor,nicolas-p/factor,factor/factor,AlexIljin/factor,nicolas-p/factor,tgunr/factor,mrjbq7/factor,AlexIljin/factor,tgunr/factor