Merge pull request !1228 from liuxiao/UnsortedSegmentMin

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

Merge pull request !1203 from changzherui/code516

Merge pull request !1195 from jiangjinsheng/issue_geswitch

iou

NMSWithMask

larsupdate testcase

sgd testcase

Merge pull request !1094 from zhouneng/add_vm_support_l2normalize

Merge pull request !683 from xychow/bypass-renorm-and-specialize-hypermap-parameter

Merge pull request !1062 from liuxiao/softplus-softplusgrad

Merge pull request !1055 from jiangjinsheng/vm_floor

Merge pull request !1048 from panyifeng/index_to_switch_case

Merge pull request !1031 from amongo/ValueTupleOfNestedGraph

transform valuetuple to maketuple of graphs

add testcase

Merge pull request !967 from panyifeng/switch_case_primitive

Merge pull request !935 from zhangbuxue/develop_scatter_max_op_and_dock_ge

Merge pull request !957 from jiangjinsheng/space_to_batch

SparseApplyAdagrad example format

PReLU and grad state 1-d not supported

atan2 bprop dx dy revert to original shapes

Merge pull request !849 from vlne-v1/I1FQ76-wrong-format-of-boardcast-output-when-multi-output

Merge pull request !882 from zhangbuxue/fix_bprop_for_floor_mod

fix DiagPart constant folding issue

fix argmin output type check

fix atan2 doc error

fix remove FusedBatchNorm and its grad

Merge pull request !841 from zhangbuxue/adapt_ExtractImagePatches_and_fix_EluGrad

Signed-off-by: candanzg <zhangshucheng@huawei.com>