use debug page protocol not iframe protocol
use debug page protocol not iframe protocol

close #482

wangjun/pyspider,nicozhang/pyspider,eromoe/pyspider,wonderay/pyspider,qiulimao/weblocust,eromoe/pyspider,binux/pyspider,luoq/pyspider,binux/pyspider,lashwang/pyspider,eromoe/pyspider,binux/pyspider,luoq/pyspider,nicozhang/pyspider,snakeliwei/pyspider,luoq/pyspider,nicozhang/pyspider,wangjun/pyspider,wonderay/pyspider,lashwang/pyspider,wangjun/pyspider,snakeliwei/pyspider,qiulimao/weblocust,wonderay/pyspider,qiulimao/weblocust,lashwang/pyspider,snakeliwei/pyspider