Merge pull request !314 from VectorSL/assign

Merge pull request !392 from caifubi/use-graphid-as-key-in-ascend-kernel-runtime

Merge pull request !217 from zhangbuxue/support_pow_operator

!332 Fixing problems including class slice example in ME cannot run, adding an example for class SigmoidCrossEntropyWIthLogits in ME etc.
Merge pull request !332 from zhangzheng/master

Merge pull request !379 from JichenZhao/groupnorm

Merge pull request !382 from yangzhenzhang/sigmoidloss

Fixing problem issues including class slice example cannot run, adding an example for class SigmoidCrossEntropyWithLogits etc.

Merge pull request !389 from leonwanghui/dockerfile

Signed-off-by: Nleonwanghui <wanghui71leon@gmail.com>

Merge pull request !342 from zjun/fix_log_level

Merge pull request !376 from wenchunjiang/getnext_pass

Merge pull request !374 from chenfei/share-mem-of-parameter-between-child-graph

Merge pull request !380 from chenjianping/build-bat-support-input

Merge pull request !371 from ZPaC/add-gpu-distributed-ci-test-case

Merge pull request !360 from ZPaC/gpu-backend-supports-multiple-streams

Merge pull request !373 from Simson/push-to-opensource

Merge pull request !285 from ZhangQinghua/master

Merge pull request !368 from ZhouFeng/fix-pkg-path

Merge pull request !363 from SanjayChan/labao

Merge pull request !365 from seatea/randomchoicewithmask-example

Merge pull request !364 from chenjianping/fix_gpu_init_bug

Merge pull request !361 from pengyanjun/add_tdt_transfer_data_limit_doc