Merge pull request !1344 from jiangjinsheng/issue_batchnorm_grad

Merge pull request !1133 from zhangbuxue/support_tensor_get_value_by_tensor_index

support tensor set value by tensor index

Merge pull request !1302 from lihongkang/master

Merge pull request !1282 from jiangjinsheng/vm_prelu

Merge pull request !1125 from jiangjinsheng/space_to_depth

Merge pull request !1262 from wanghua/master

Merge pull request !1111 from jiangjinsheng/vm_pack

Merge pull request !1242 from jiangjinsheng/vm_arg_max

Merge pull request !1221 from jiangjinsheng/bn_training_update_v2

Merge pull request !1129 from zhaozhenlong/op/bounding-box-encoder

iou

NMSWithMask

larsupdate testcase

sgd testcase

Merge pull request !1094 from zhouneng/add_vm_support_l2normalize

Merge pull request !1121 from lihongkang/master

Merge pull request !1091 from chenweifeng/cast

Merge pull request !1062 from liuxiao/softplus-softplusgrad

Merge pull request !1085 from zhaozhenlong/vm-adapt-topk

Merge pull request !1013 from YuJianfeng/master

Merge pull request !976 from zhaozhenlong/adapt-lamb-nextmv-with-decay