Using 'fetch' module instead of 'request'.

Hi, Vadim:
**request** is very well, but sometimes, it's difficult to deal with multi-languages, messy codes always come out, even though 90% conditions we can handle.

in my cases, i use **fetch** a lot,  and it supports gzipped, auto decode encoded contents, much quicker than **request**,  and more wonderful, we can reduce our dependencies and codes a lot, keep your module light weight....^^

test page:
http://m.news.cntv.cn/2014/05/05/ARTI1399239610995395.shtml