added unit test for _.where with parameter 'first'
added unit test for _.where with parameter 'first'

braddunbar/underscore,xiaoqiang730730/underscore,jianganglu/underscore,lis186/underscore,RepmujNetsik/underscore,thiswildorchid/underscore,strongconjunctions/underscore,jridgewell/underscore,dxuehu/underscore,zhangguangyong/underscore,lucasfanning/underscore,documentcloud/underscore,Feiyang1/underscore,irr/underscore,dkusch/underscore,Feiyang1/underscore,jdelbello/underscore,thisismygithub/underscore,jolthoff/underscore,rlugojr/underscore,keepgoingwm/underscore,JonAbrams/underscore,sdwang/underscore,janocat/underscore,npmcomponent/jashkenas-underscore,lqjack/underscore,jfarid27/underscore,jfarid27/underscore,JonAbrams/underscore,snackshen/underscore,jolthoff/underscore,jashkenas/underscore,megawac/underscore,singhsterabhi/underscore,huzion/underscore,jashkenas/underscore,liminghui/underscore,eaglesjava/underscore,Yangani/underscore,rlugojr/underscore,liminghui/underscore,hackreactor/underscore,debutt/underscore,RepmujNetsik/underscore,mairasala/underscore,zabefloyd/underscore,gougouGet/underscore,ElseZhang/underscore,yuhualingfeng/underscore,ijidan/underscore,cgvarela/underscore,eaglesjava/underscore,gougouGet/underscore,irr/underscore,mjhasbach/underscore,imsingh/underscore,vinodbonala/underscore,jdelbello/underscore,xiaoqiang730730/underscore,dyx/underscore,jpalomar/underscore,dxuehu/underscore,premkumargithub/underscore,jiankers/underscore,snackshen/underscore,thisismygithub/underscore,liyandalmllml/underscore,lucasfanning/underscore,falqas/underscore,kuychaco/underscore,SerenoShen/underscore,tnga/underscore-es,colemakdvorak/underscore,wxmfront/underscore,vincent1988/underscore,Joanna913/underscore,strongconjunctions/underscore,beenlee/underscore,JoaquinSiabra/underscore,elancom/underscore,PUSEN/underscore,akre54/underscore,wjb12/underscore,Gimcrack/underscore,oss6/underscore,janocat/underscore,paulfalgout/underscore,jridgewell/underscore,Joanna913/underscore,jpalomar/underscore,roychen-7/underscore,mdboop/underscore,jianganglu/underscore,mjhasbach/underscore,starterstep/underscore,wjb12/underscore,componentizr/underscore,cintiamh/underscore,mairasala/underscore,falqas/underscore,greyhwndz/underscore,yuhualingfeng/underscore,craigmichaelmartin/underscore,yekg880809/underscore,tnga/underscore-es,platinumazure/underscore,jordanwink201/underscore,bkillenit/underscore,wxmfront/underscore,amdjs/underscore,ijidan/underscore,polandeme/underscore,aziz-boudi4/underscore,dyx/underscore,aziz-boudi4/underscore,nickkneafsey/underscore,huangnan1/2016gitStudy,PengShi-sp/underscore,ryanwholey/underscore,polandeme/underscore,Forever8/underscore,jonot/underscore,colemakdvorak/underscore,PengShi-sp/underscore,LiskHQ/underscore,thiswildorchid/underscore,oss6/underscore,zabefloyd/underscore,vincent1988/underscore,SeriaWei/underscore,Tim-Zhang/underscore,huangnan1/2016gitStudy,natac13/underscore,greyhwndz/underscore,ereddate/underscore,kwangkim/underscore,kwangkim/underscore,WangRex/underscore,dimitriwalters/underscore,ligson/underscore,emiel187/underscore,Aplopio/underscore,JoaquinSiabra/underscore,premkumargithub/underscore,Forever8/underscore,natac13/underscore,SeriaWei/underscore,debutt/underscore,ThiagoGarciaAlves/underscore,jonot/underscore,kairyan/underscore,AaronNGray/underscore-server,cgvarela/underscore,veg/underscore,kuychaco/underscore,dkusch/underscore,amdjs/underscore,Tim-Zhang/underscore,youprofit/underscore,AaronNGray/underscore-server,elancom/underscore,Gimcrack/underscore,prosenjit-itobuz/underscore,platinumazure/underscore,youprofit/underscore,akre54/underscore,bkillenit/underscore,lis186/underscore,liyandalmllml/underscore,yekg880809/underscore,mitar/underscore,PUSEN/underscore,huzion/underscore,hackreactor/underscore,Aplopio/underscore,ryanwholey/underscore,documentcloud/underscore,SerenoShen/underscore,nickkneafsey/underscore,craigmichaelmartin/underscore,roychen-7/underscore,LiskHQ/underscore,WangRex/underscore,kairyan/underscore,vinodbonala/underscore,jiankers/underscore,cnwhy/underscore,prosenjit-itobuz/underscore,zhangguangyong/underscore,singhsterabhi/underscore,ligson/underscore,dfurtado/underscore,cintiamh/underscore,cailong1028/underscore,Yangani/underscore,keepgoingwm/underscore,sdwang/underscore,starterstep/underscore,Tetpay/underscore,dfurtado/underscore,appleboy/underscore,ThiagoGarciaAlves/underscore,jordanwink201/underscore,lqjack/underscore,emiel187/underscore,veg/underscore,mdboop/underscore,mitar/underscore,beenlee/underscore,ereddate/underscore,cnwhy/underscore,ElseZhang/underscore,imsingh/underscore