[TUTORIAL] use resnet v2 (#51)
[TUTORIAL] use resnet v2 (#51)

* use resnet v2

* fix

imai-lm/nnvm,imai-lm/nnvm,imai-lm/nnvm,ZihengJiang/nnvm,ZihengJiang/nnvm,piiswrong/nnvm,ZihengJiang/nnvm,piiswrong/nnvm,piiswrong/nnvm