update dataapi doc
update dataapi doc

takezoe/incubator-predictionio,net-shell/PredictionIO,EmergentOrder/PredictionIO,PredictionIO/PredictionIO,adamharish/PredictionIO,dszeto/incubator-predictionio,wenaz/PredictionIO,BojianLi/PredictionIO,zafarella/PredictionIO,himanshudhami/PredictionIO,sevenihust/PredictionIO,ch33hau/PredictionIO,akaash-nigam/PredictionIO,BojianLi/PredictionIO,jasonchaffee/PredictionIO,beni55/PredictionIO,shimamoto/incubator-predictionio,zafarella/PredictionIO,dszeto/incubator-predictionio,alex9311/PredictionIO,hsavit1/PredictionIO,akaash-nigam/PredictionIO,BuildAPE/PredictionIO,codingang/PredictionIO,takezoe/incubator-predictionio,akaash-nigam/PredictionIO,prmdsharma/PredictionIO,tastatur/PredictionIO,stephen-corgiat/PredictionIO,jingyidata/PredictionIO,shimamoto/incubator-predictionio,b-cuts/PredictionIO,ydanilenko/PredictionIO,thiagoveras/PredictionIO,indranig/PredictionIO,EmergentOrder/PredictionIO,atyenoria/PredictionIO,schon/PredictionIO,prmdsharma/PredictionIO,sevenihust/PredictionIO,ydanilenko/PredictionIO,wenaz/PredictionIO,Emaasit/PredictionIO,ch33hau/PredictionIO,shimamoto/incubator-predictionio,pferrel/PredictionIO,ydanilenko/PredictionIO,cristiancrc/PredictionIO,takeshineshiro/PredictionIO,initChan/PredictionIO,EmergentOrder/PredictionIO,beni55/PredictionIO,mars/incubator-predictionio,marevol/incubator-predictionio,atyenoria/PredictionIO,rsganesh83/PredictionIO,wangmiao1981/PredictionIO,skmezanul/PredictionIO,tastatur/PredictionIO,himanshudhami/PredictionIO,prmdsharma/PredictionIO,ionux/PredictionIO,marevol/incubator-predictionio,sekaiamber/PredictionIO,mars/incubator-predictionio,akaash-nigam/PredictionIO,ionux/PredictionIO,Ribeiro/PredictionIO,net-shell/PredictionIO,ydanilenko/PredictionIO,jlegendary/PredictionIO,cristiancrc/PredictionIO,codingang/PredictionIO,schon/PredictionIO,zafarella/PredictionIO,nvoron23/PredictionIO,elkingtonmcb/PredictionIO,initChan/PredictionIO,himanshudhami/PredictionIO,codingang/PredictionIO,BuildAPE/PredictionIO,atyenoria/PredictionIO,TheDataShed/PredictionIO,druzbikova/PredictionIO,stephen-corgiat/PredictionIO,indranig/PredictionIO,jingyidata/PredictionIO,net-shell/PredictionIO,takeshineshiro/PredictionIO,Ribeiro/PredictionIO,clemp6r/PredictionIO,stephen-corgiat/PredictionIO,wangmiao1981/PredictionIO,Ribeiro/PredictionIO,druzbikova/PredictionIO,atyenoria/PredictionIO,Ribeiro/PredictionIO,BojianLi/PredictionIO,ionux/PredictionIO,TheDataShed/PredictionIO,adamharish/PredictionIO,doron123/PredictionIO,b-cuts/PredictionIO,jlegendary/PredictionIO,sekaiamber/PredictionIO,akaash-nigam/PredictionIO,takezoe/incubator-predictionio,thiagoveras/PredictionIO,druzbikova/PredictionIO,PredictionIO/PredictionIO,marevol/incubator-predictionio,prmdsharma/PredictionIO,PredictionIO/PredictionIO,ydanilenko/PredictionIO,ch33hau/PredictionIO,rbo7nik/PredictionIO,biddyweb/PredictionIO,elkingtonmcb/PredictionIO,wenaz/PredictionIO,hsavit1/PredictionIO,shimamoto/incubator-predictionio,tuxdna/PredictionIO,initChan/PredictionIO,doron123/PredictionIO,TheDataShed/PredictionIO,atyenoria/PredictionIO,b-cuts/PredictionIO,doron123/PredictionIO,michaelshing/PredictionIO,jasonchaffee/PredictionIO,indranig/PredictionIO,arudenko/PredictionIO,pferrel/PredictionIO,BojianLi/PredictionIO,BuildAPE/PredictionIO,biddyweb/PredictionIO,djeraseit/PredictionIO,djeraseit/PredictionIO,elkingtonmcb/PredictionIO,BojianLi/PredictionIO,clemp6r/PredictionIO,Ribeiro/PredictionIO,jasonchaffee/PredictionIO,doron123/PredictionIO,indranig/PredictionIO,clemp6r/PredictionIO,nvoron23/PredictionIO,skmezanul/PredictionIO,michaelshing/PredictionIO,net-shell/PredictionIO,jingyidata/PredictionIO,wangmiao1981/PredictionIO,nvoron23/PredictionIO,beni55/PredictionIO,schon/PredictionIO,net-shell/PredictionIO,doron123/PredictionIO,codingang/PredictionIO,michaelshing/PredictionIO,takeshineshiro/PredictionIO,alex9311/PredictionIO,arudenko/PredictionIO,sekaiamber/PredictionIO,rsganesh83/PredictionIO,skmezanul/PredictionIO,codingang/PredictionIO,alex9311/PredictionIO,tastatur/PredictionIO,tuxdna/PredictionIO,djeraseit/PredictionIO,nvoron23/PredictionIO,hsavit1/PredictionIO,rbo7nik/PredictionIO,tuxdna/PredictionIO,marevol/incubator-predictionio,sevenihust/PredictionIO,biddyweb/PredictionIO,jlegendary/PredictionIO,adamharish/PredictionIO,thiagoveras/PredictionIO,Emaasit/PredictionIO,Emaasit/PredictionIO,takezoe/incubator-predictionio,mars/incubator-predictionio,jlegendary/PredictionIO,rsganesh83/PredictionIO,rbo7nik/PredictionIO,arudenko/PredictionIO,TheDataShed/PredictionIO,jlegendary/PredictionIO,pferrel/PredictionIO,mars/incubator-predictionio,indranig/PredictionIO,prmdsharma/PredictionIO,nvoron23/PredictionIO,TheDataShed/PredictionIO,cristiancrc/PredictionIO,dszeto/incubator-predictionio,himanshudhami/PredictionIO,dszeto/incubator-predictionio