fixed incorrect jquery.each call in readme.md
fixed incorrect jquery.each call in readme.md

The example code in the readme had an incorrect $.each call. It should now run as intended.
Luxame/node-crawler,PeterWangPo/node-crawler,tempbottle/node-crawler,sylvinus/node-crawler,uhtred/node-crawler,hechunwen/node-crawler,chienjchienj/node-crawler,sylvinus/node-crawler,ozlevka/node-crawler,duyetdev/node-crawler,shedar/node-webcrawler,yoshimaa/node-crawler,bda-research/node-webcrawler,timbowhite/node-crawler,donsunsoft/node-crawler,tzq668766/node-crawler,vcarrera/node-crawler,tempbottle/node-crawler,donsunsoft/node-crawler,Luxame/node-crawler,yoshimaa/node-crawler,timbowhite/node-crawler,shedar/node-webcrawler,ozlevka/node-crawler,vcarrera/node-crawler,bda-research/node-crawler,tzq668766/node-crawler,duyetdev/node-crawler,oliverhuang/node-crawler,toanalien/node-crawler,bda-research/node-webcrawler,SilverMonk/node-crawler,SilverMonk/node-crawler,bda-research/node-crawler,oliverhuang/node-crawler,uhtred/node-crawler,PeterWangPo/node-crawler,hechunwen/node-crawler,bda-research/node-crawler,toanalien/node-crawler,chienjchienj/node-crawler