added more multipart tests
added more multipart tests

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