Add stacked fused RNN example (#5186)
Add stacked fused RNN example (#5186)

* Add stacked fused RNN example

* Add parse option for stacked rnn

* Add missing warning messages

szha/mxnet,ykim362/mxnet,reminisce/mxnet,reminisce/mxnet,DR08/mxnet,indhub/mxnet,yuruofeifei/mxnet,pluskid/mxnet,hotpxl/mxnet,piiswrong/mxnet,likelyzhao/mxnet,Mega-DatA-Lab/mxnet,zhreshold/mxnet,jiajiechen/mxnet,wangyum/mxnet,dmlc/mxnet,szha/mxnet,yuruofeifei/mxnet,kevinthesun/mxnet,fullfanta/mxnet,mbaijal/incubator-mxnet,leezu/mxnet,pluskid/mxnet,arank/mxnet,TuSimple/mxnet,formath/mxnet,indhub/mxnet,CodingCat/mxnet,ptrendx/mxnet,jiajiechen/mxnet,apaleyes/mxnet,jiajiechen/mxnet,nicklhy/mxnet,yajiedesign/mxnet,danithaca/mxnet,piiswrong/mxnet,Ldpe2G/mxnet,smolix/incubator-mxnet,thirdwing/mxnet,precedenceguo/mxnet,precedenceguo/mxnet,jermainewang/mxnet,stefanhenneking/mxnet,antoan2/incubator-mxnet,arank/mxnet,antoan2/incubator-mxnet,sxjscience/mxnet,navrasio/mxnet,crazy-cat/incubator-mxnet,rahul003/mxnet,hpi-xnor/BMXNet,saurabh3949/mxnet,DickJC123/mxnet,ptrendx/mxnet,coder-james/mxnet,crazy-cat/incubator-mxnet,jamesliu/mxnet,smolix/incubator-mxnet,solin319/incubator-mxnet,wangyum/mxnet,yajiedesign/mxnet,fullfanta/mxnet,smolix/incubator-mxnet,Prasad9/incubator-mxnet,ShownX/incubator-mxnet,hesseltuinhof/mxnet,jennyzhang0215/incubator-mxnet,saurabh3949/mxnet,mbaijal/incubator-mxnet,stefanhenneking/mxnet,yajiedesign/mxnet,ptrendx/mxnet,hesseltuinhof/mxnet,LinkHS/incubator-mxnet,jennyzhang0215/incubator-mxnet,rahul003/mxnet,szha/mxnet,ykim362/mxnet,hpi-xnor/BMXNet,ForkedReposBak/mxnet,kevinthesun/mxnet,larroy/mxnet,Northrend/mxnet,hpi-xnor/BMXNet,LinkHS/incubator-mxnet,larroy/mxnet,ForkedReposBak/mxnet,arank/mxnet,EvanzzzZ/mxnet,luoyetx/mxnet,jamesliu/mxnet,arikpoz/mxnet,lxn2/mxnet,vikingMei/mxnet,TuSimple/mxnet,EvanzzzZ/mxnet,likelyzhao/mxnet,tlby/mxnet,Northrend/mxnet,vikingMei/mxnet,ptrendx/mxnet,Prasad9/incubator-mxnet,precedenceguo/mxnet,tornadomeet/mxnet,vikingMei/mxnet,jamesliu/mxnet,TuSimple/mxnet,leezu/mxnet,Ldpe2G/mxnet,mbaijal/incubator-mxnet,hesseltuinhof/mxnet,fullfanta/mxnet,ShownX/incubator-mxnet,sergeykolychev/mxnet,precedenceguo/mxnet,EvanzzzZ/mxnet,gautamkmr/incubator-mxnet,wangyum/mxnet,tlby/mxnet,DR08/mxnet,mbaijal/incubator-mxnet,Prasad9/incubator-mxnet,zhreshold/mxnet,pluskid/mxnet,Ldpe2G/mxnet,zhreshold/mxnet,nicklhy/mxnet,kkk669/mxnet,rahul003/mxnet,ShownX/incubator-mxnet,madjam/mxnet,arikpoz/mxnet,crazy-cat/incubator-mxnet,antoan2/incubator-mxnet,gautamkmr/incubator-mxnet,danithaca/mxnet,crazy-cat/incubator-mxnet,sergeykolychev/mxnet,Mega-DatA-Lab/mxnet,gautamkmr/incubator-mxnet,DR08/mxnet,stefanhenneking/mxnet,piiswrong/mxnet,ptrendx/mxnet,pluskid/mxnet,szha/mxnet,szha/mxnet,reminisce/mxnet,madjam/mxnet,sergeykolychev/mxnet,jennyzhang0215/incubator-mxnet,hpi-xnor/BMXNet,ZihengJiang/mxnet,likelyzhao/mxnet,leezu/mxnet,likelyzhao/mxnet,jamesliu/mxnet,kkk669/mxnet,eric-haibin-lin/mxnet,jermainewang/mxnet,sergeykolychev/mxnet,tlby/mxnet,CodingCat/mxnet,apaleyes/mxnet,luoyetx/mxnet,TuSimple/mxnet,solin319/incubator-mxnet,jamesliu/mxnet,sergeykolychev/mxnet,fullfanta/mxnet,luoyetx/mxnet,tornadomeet/mxnet,jermainewang/mxnet,jiajiechen/mxnet,indhub/mxnet,eric-haibin-lin/mxnet,eric-haibin-lin/mxnet,nicklhy/mxnet,larroy/mxnet,hpi-xnor/BMXNet,jennyzhang0215/incubator-mxnet,madjam/mxnet,ZihengJiang/mxnet,Prasad9/incubator-mxnet,thirdwing/mxnet,hesseltuinhof/mxnet,luoyetx/mxnet,szha/mxnet,ForkedReposBak/mxnet,yajiedesign/mxnet,lxn2/mxnet,mbaijal/incubator-mxnet,kevinthesun/mxnet,ShownX/incubator-mxnet,jiajiechen/mxnet,apaleyes/mxnet,szha/mxnet,weleen/mxnet,precedenceguo/mxnet,tornadomeet/mxnet,jiajiechen/mxnet,xcgoner/dist-mxnet,reminisce/mxnet,dmlc/mxnet,kkk669/mxnet,EvanzzzZ/mxnet,formath/mxnet,TuSimple/mxnet,luoyetx/mxnet,sxjscience/mxnet,Mega-DatA-Lab/mxnet,danithaca/mxnet,ykim362/mxnet,ForkedReposBak/mxnet,madjam/mxnet,smolix/incubator-mxnet,ZihengJiang/mxnet,tlby/mxnet,jennyzhang0215/incubator-mxnet,coder-james/mxnet,DR08/mxnet,jennyzhang0215/incubator-mxnet,dmlc/mxnet,apache/incubator-mxnet,LinkHS/incubator-mxnet,rishita/mxnet,rishita/mxnet,stefanhenneking/mxnet,jiajiechen/mxnet,kkk669/mxnet,rishita/mxnet,LinkHS/incubator-mxnet,crazy-cat/incubator-mxnet,luoyetx/mxnet,mbaijal/incubator-mxnet,xcgoner/dist-mxnet,tornadomeet/mxnet,navrasio/mxnet,zhreshold/mxnet,weleen/mxnet,arikpoz/mxnet,EvanzzzZ/mxnet,arikpoz/mxnet,smolix/incubator-mxnet,tornadomeet/mxnet,thirdwing/mxnet,hpi-xnor/BMXNet,sxjscience/mxnet,hpi-xnor/BMXNet,vikingMei/mxnet,navrasio/mxnet,solin319/incubator-mxnet,ForkedReposBak/mxnet,nicklhy/mxnet,weleen/mxnet,solin319/incubator-mxnet,Ldpe2G/mxnet,Northrend/mxnet,ForkedReposBak/mxnet,TuSimple/mxnet,ptrendx/mxnet,sxjscience/mxnet,ZihengJiang/mxnet,TuSimple/mxnet,Ldpe2G/mxnet,fullfanta/mxnet,piiswrong/mxnet,Northrend/mxnet,stefanhenneking/mxnet,precedenceguo/mxnet,saurabh3949/mxnet,TuSimple/mxnet,wangyum/mxnet,xcgoner/dist-mxnet,ykim362/mxnet,Northrend/mxnet,tlby/mxnet,rahul003/mxnet,larroy/mxnet,yajiedesign/mxnet,pluskid/mxnet,leezu/mxnet,sxjscience/mxnet,DR08/mxnet,tornadomeet/mxnet,crazy-cat/incubator-mxnet,madjam/mxnet,apache/incubator-mxnet,apaleyes/mxnet,tornadomeet/mxnet,zhreshold/mxnet,reminisce/mxnet,navrasio/mxnet,DickJC123/mxnet,tornadomeet/mxnet,hotpxl/mxnet,arank/mxnet,precedenceguo/mxnet,jamesliu/mxnet,formath/mxnet,likelyzhao/mxnet,formath/mxnet,reminisce/mxnet,xcgoner/dist-mxnet,apaleyes/mxnet,ShownX/incubator-mxnet,precedenceguo/mxnet,solin319/incubator-mxnet,jamesliu/mxnet,zhreshold/mxnet,ShownX/incubator-mxnet,apaleyes/mxnet,larroy/mxnet,crazy-cat/incubator-mxnet,gautamkmr/incubator-mxnet,ShownX/incubator-mxnet,leezu/mxnet,arank/mxnet,kevinthesun/mxnet,formath/mxnet,EvanzzzZ/mxnet,ZihengJiang/mxnet,Mega-DatA-Lab/mxnet,arikpoz/mxnet,yuruofeifei/mxnet,likelyzhao/mxnet,apache/incubator-mxnet,danithaca/mxnet,nicklhy/mxnet,eric-haibin-lin/mxnet,solin319/incubator-mxnet,Northrend/mxnet,rishita/mxnet,wangyum/mxnet,luoyetx/mxnet,vikingMei/mxnet,piiswrong/mxnet,CodingCat/mxnet,gautamkmr/incubator-mxnet,kevinthesun/mxnet,hesseltuinhof/mxnet,apaleyes/mxnet,jermainewang/mxnet,dmlc/mxnet,saurabh3949/mxnet,kevinthesun/mxnet,nicklhy/mxnet,reminisce/mxnet,larroy/mxnet,EvanzzzZ/mxnet,navrasio/mxnet,CodingCat/mxnet,reminisce/mxnet,formath/mxnet,navrasio/mxnet,larroy/mxnet,arikpoz/mxnet,saurabh3949/mxnet,wangyum/mxnet,Mega-DatA-Lab/mxnet,fullfanta/mxnet,jermainewang/mxnet,yuruofeifei/mxnet,lxn2/mxnet,ptrendx/mxnet,likelyzhao/mxnet,gautamkmr/incubator-mxnet,apaleyes/mxnet,dmlc/mxnet,arank/mxnet,hotpxl/mxnet,sergeykolychev/mxnet,thirdwing/mxnet,jennyzhang0215/incubator-mxnet,precedenceguo/mxnet,kevinthesun/mxnet,kevinthesun/mxnet,pluskid/mxnet,indhub/mxnet,arikpoz/mxnet,Northrend/mxnet,pluskid/mxnet,danithaca/mxnet,fullfanta/mxnet,crazy-cat/incubator-mxnet,yajiedesign/mxnet,lxn2/mxnet,ShownX/incubator-mxnet,ZihengJiang/mxnet,larroy/mxnet,Ldpe2G/mxnet,hpi-xnor/BMXNet,Mega-DatA-Lab/mxnet,tlby/mxnet,antoan2/incubator-mxnet,antoan2/incubator-mxnet,nicklhy/mxnet,saurabh3949/mxnet,piiswrong/mxnet,CodingCat/mxnet,piiswrong/mxnet,Mega-DatA-Lab/mxnet,thirdwing/mxnet,DickJC123/mxnet,tlby/mxnet,coder-james/mxnet,hotpxl/mxnet,yuruofeifei/mxnet,coder-james/mxnet,saurabh3949/mxnet,navrasio/mxnet,gautamkmr/incubator-mxnet,vikingMei/mxnet,wangyum/mxnet,rishita/mxnet,madjam/mxnet,xcgoner/dist-mxnet,leezu/mxnet,wangyum/mxnet,Prasad9/incubator-mxnet,jiajiechen/mxnet,sergeykolychev/mxnet,leezu/mxnet,ptrendx/mxnet,hesseltuinhof/mxnet,Prasad9/incubator-mxnet,Ldpe2G/mxnet,rishita/mxnet,ykim362/mxnet,jamesliu/mxnet,stefanhenneking/mxnet,Prasad9/incubator-mxnet,ZihengJiang/mxnet,EvanzzzZ/mxnet,DR08/mxnet,stefanhenneking/mxnet,hesseltuinhof/mxnet,stefanhenneking/mxnet,yajiedesign/mxnet,arank/mxnet,tlby/mxnet,madjam/mxnet,thirdwing/mxnet,dmlc/mxnet,formath/mxnet,thirdwing/mxnet,szha/mxnet,crazy-cat/incubator-mxnet,antoan2/incubator-mxnet,weleen/mxnet,vikingMei/mxnet,Northrend/mxnet,antoan2/incubator-mxnet,thirdwing/mxnet,lxn2/mxnet,jennyzhang0215/incubator-mxnet,gautamkmr/incubator-mxnet,smolix/incubator-mxnet,smolix/incubator-mxnet,piiswrong/mxnet,coder-james/mxnet,vikingMei/mxnet,gautamkmr/incubator-mxnet,jermainewang/mxnet,stefanhenneking/mxnet,sergeykolychev/mxnet,yuruofeifei/mxnet,danithaca/mxnet,indhub/mxnet,Prasad9/incubator-mxnet,szha/mxnet,eric-haibin-lin/mxnet,dmlc/mxnet,ykim362/mxnet,saurabh3949/mxnet,indhub/mxnet,xcgoner/dist-mxnet,smolix/incubator-mxnet,danithaca/mxnet,eric-haibin-lin/mxnet,ykim362/mxnet,Mega-DatA-Lab/mxnet,thirdwing/mxnet,danithaca/mxnet,tornadomeet/mxnet,rishita/mxnet,zhreshold/mxnet,leezu/mxnet,arikpoz/mxnet,LinkHS/incubator-mxnet,zhreshold/mxnet,pluskid/mxnet,ykim362/mxnet,fullfanta/mxnet,madjam/mxnet,DR08/mxnet,lxn2/mxnet,coder-james/mxnet,Ldpe2G/mxnet,CodingCat/mxnet,smolix/incubator-mxnet,yuruofeifei/mxnet,xcgoner/dist-mxnet,jiajiechen/mxnet,navrasio/mxnet,kkk669/mxnet,ForkedReposBak/mxnet,kkk669/mxnet,hotpxl/mxnet,coder-james/mxnet,navrasio/mxnet,ykim362/mxnet,apaleyes/mxnet,danithaca/mxnet,mbaijal/incubator-mxnet,likelyzhao/mxnet,lxn2/mxnet,ForkedReposBak/mxnet,kkk669/mxnet,DR08/mxnet,piiswrong/mxnet,zhreshold/mxnet,larroy/mxnet,arikpoz/mxnet,kkk669/mxnet,kkk669/mxnet,hesseltuinhof/mxnet,CodingCat/mxnet,eric-haibin-lin/mxnet,hotpxl/mxnet,formath/mxnet,rahul003/mxnet,hotpxl/mxnet,LinkHS/incubator-mxnet,ForkedReposBak/mxnet,sxjscience/mxnet,TuSimple/mxnet,DickJC123/mxnet,Northrend/mxnet,rishita/mxnet,fullfanta/mxnet,rahul003/mxnet,coder-james/mxnet,luoyetx/mxnet,yajiedesign/mxnet,DR08/mxnet,LinkHS/incubator-mxnet,solin319/incubator-mxnet,jermainewang/mxnet,tlby/mxnet,indhub/mxnet,nicklhy/mxnet,eric-haibin-lin/mxnet,yuruofeifei/mxnet,pluskid/mxnet,mbaijal/incubator-mxnet,rahul003/mxnet,ptrendx/mxnet,apache/incubator-mxnet,TuSimple/mxnet,xcgoner/dist-mxnet,weleen/mxnet,jamesliu/mxnet,rahul003/mxnet,lxn2/mxnet,antoan2/incubator-mxnet,antoan2/incubator-mxnet,sxjscience/mxnet,ZihengJiang/mxnet,leezu/mxnet,Ldpe2G/mxnet,ShownX/incubator-mxnet,weleen/mxnet,xcgoner/dist-mxnet,jennyzhang0215/incubator-mxnet,vikingMei/mxnet,sergeykolychev/mxnet,wangyum/mxnet,tlby/mxnet,jermainewang/mxnet,eric-haibin-lin/mxnet,dmlc/mxnet,kevinthesun/mxnet,rishita/mxnet,weleen/mxnet,indhub/mxnet,weleen/mxnet,likelyzhao/mxnet,solin319/incubator-mxnet,sxjscience/mxnet,Prasad9/incubator-mxnet,yuruofeifei/mxnet,reminisce/mxnet,ZihengJiang/mxnet,jermainewang/mxnet,arank/mxnet,LinkHS/incubator-mxnet,saurabh3949/mxnet,formath/mxnet,hpi-xnor/BMXNet,coder-james/mxnet,reminisce/mxnet,hotpxl/mxnet,LinkHS/incubator-mxnet,EvanzzzZ/mxnet,weleen/mxnet,madjam/mxnet,lxn2/mxnet,hotpxl/mxnet,luoyetx/mxnet,Mega-DatA-Lab/mxnet,mbaijal/incubator-mxnet,solin319/incubator-mxnet,arank/mxnet,dmlc/mxnet,CodingCat/mxnet,nicklhy/mxnet,indhub/mxnet,yajiedesign/mxnet,ptrendx/mxnet,rahul003/mxnet,CodingCat/mxnet,hesseltuinhof/mxnet,sxjscience/mxnet