add test to check if response acts as a readable stream
add test to check if response acts as a readable stream

yussan/superagent,aaroncrows/superagent,killerlayup/superagent,focusaurus/superagent,KuroGuo/suberagent,modulexcite/superagent,sutoiku/superagent,zsh2938/superagent,philipshurpik/superagent,aaroncrows/superagent,soyuka/superagent,brainbytes/superagent,stanzi83/superagent,kmalakoff/superagent-ls,thejameskyle/superagent,andyburke/superagent,jarvisaoieong/superagent,visionmedia/superagent,modulexcite/superagent,bevacqua/superagent,RubenVerborgh/superagent,classdojo/superagent,alinz/superagent,sebastianvera/superagent,simonvizzini/superagent,stasha/superagent,h1bomb/superagent,noikiy/suberagent,ccapndave/superagent,wushuyi/superagent,sutoiku/superagent,eligolding/superagent,mvanlonden/superagent-webpack-client,brotchie/superagent,targos/superagent,craigspaeth/superagent,nemisj/superagent,jarvisaoieong/superagent,puterakahfi/superagent,visionmedia/superagent,KingMario/superagent,andyburke/superagent,nemisj/superagent,soyuka/superagent,brotchie/superagent,yeatszhang/superagent,drinks/superagent,sebastianvera/superagent,focusaurus/superagent,KingMario/superagent,reinaldo13/superagent,wushuyi/superagent,craigspaeth/superagent,simonvizzini/superagent,fredigato/superagent,stanzi83/superagent,philipshurpik/superagent,mvanlonden/superagent-webpack-client,targos/superagent,deltreey/superagent,drinks/superagent,ertrzyiks/superagent,eligolding/superagent,killerlayup/superagent,thejameskyle/superagent,fredigato/superagent,reinaldo13/superagent,deltreey/superagent,alinz/superagent,RubenVerborgh/superagent,yussan/superagent,geminiyellow/superagent,KuroGuo/suberagent,puterakahfi/superagent,visionmedia/superagent,classdojo/superagent,geminiyellow/superagent,stasha/superagent,kmalakoff/superagent-ls,h1bomb/superagent,zsh2938/superagent,ccapndave/superagent,ertrzyiks/superagent,yeatszhang/superagent,brainbytes/superagent,noikiy/suberagent