adding map & reduce from bluebirds' implementations
adding map & reduce from bluebirds' implementations

vschoettke/knex,knax/knex-bower,sxhao/knex,eknkc/knex,statyan/knex,MadcapJake/knex,harriha/knex,jevakallio/knex,MadcapJake/knex,myndzi/knex,freakynit/knex,elhigu/knex,dieface/knex,abegines/knex,chris-olszewski/knex,realtymaps/knex,linalu1/knex,faradayio/knex,joepie91/knex,sxhao/knex,freakynit/knex,harriha/knex,joepie91/knex,lanetix/knex,realtymaps/knex,joeframbach/knex,jut-io/knex,yelmontaser/knex,galenandrew/knex,realtymaps/knex,galenandrew/knex,vellotis/knex,carragom/knex,ryanwilliamquinn/knex,socialtables/knex,chrisbroome/knex,willrstern/knex,faradayio/knex,vellotis/knex,sanchesic89/knex,tschuy/knex,olalonde/knex,freakynit/knex,sanchesic89/knex,vellotis/knex,MadcapJake/knex,maxcnunes/knex,threadmeup/knex,techniq/knex,whitelynx/knex,jevakallio/knex,eknkc/knex,juanjoLenero/knex,tgriesser/knex,Atlantis-Software/knex,ryanwilliamquinn/knex,elhigu/knex,jamesanthonyferguson/knex,chrisbroome/knex,seegno-forks/knex,WaltRock/knex,CorvusCorrax/knex,nkt/knex,MWGitHub/knex,dieface/knex,jut-io/knex,chris-olszewski/knex,maxcnunes/knex,galenandrew/knex,chrisbroome/knex,xaka/knex,MWGitHub/knex,shutterstock/knex,danieltdt/knex,joeframbach/knex,faradayio/knex,tgriesser/knex,blah238/knex,lanetix/knex,elhigu/knex,techniq/knex,blah238/knex,vschoettke/knex,xaka/knex,fgcartographix/knex,MWGitHub/knex,fgcartographix/knex,fgcartographix/knex,linalu1/knex,joeframbach/knex,nkt/knex,threadmeup/knex,myndzi/knex,willrstern/knex,abegines/knex,shutterstock/knex,olalonde/knex,techniq/knex,maxcnunes/knex,lanetix/knex,socialtables/knex,joepie91/knex,yelmontaser/knex,whitelynx/knex,tschuy/knex,socialtables/knex,shutterstock/knex,vschoettke/knex,linalu1/knex,wubzz/knex,whitelynx/knex,beppu/knex,blah238/knex,statyan/knex,Atlantis-Software/knex,knax/knex-bower,dieface/knex,jevakallio/knex,WaltRock/knex,jamesanthonyferguson/knex,chuym/knex,noodle/knex,xaka/knex,noodle/knex,olalonde/knex,chris-olszewski/knex,wubzz/knex,threadmeup/knex,sxhao/knex,carragom/knex,juanjoLenero/knex,chuym/knex,tschuy/knex,eknkc/knex,CorvusCorrax/knex,tgriesser/knex,seegno-forks/knex,chuym/knex,willrstern/knex,danieltdt/knex,seegno-forks/knex,harriha/knex,knax/knex-bower,sanchesic89/knex,nkt/knex,ryanwilliamquinn/knex,yelmontaser/knex,jut-io/knex,danieltdt/knex,jamesanthonyferguson/knex,beppu/knex,juanjoLenero/knex,beppu/knex