Merge pull request !385 from Xiaoda/modify-communicaiton-cost-of-operators-and-redistribution

Merge pull request !422 from ms_yan/Generator_distri

Merge pull request !421 from ghzl/fix-no-wrap-in-ge-bankend-in-train

Merge pull request !317 from huanghui/derelu_fusion_pass

Merge pull request !415 from jjfeing/master

Merge pull request !412 from YuJianfeng/master

Merge pull request !416 from xiefangqi/br_fix_apply_comment

Merge pull request !411 from Simson/push-to-opensource

Merge pull request !402 from yangzhenzhang/square

Merge pull request !417 from anzhengqi/fix-commit-format-error

Merge pull request !408 from ZhouFeng/cmake317-windows

Merge pull request !413 from chenjianping/eliminate-securec-warning

Merge pull request !383 from zhaozhenlong/cell/psnr

Merge pull request !286 from wangqiuliang/resolve-pynative-operator-issue

Merge pull request !378 from h.farahat/multi_itr

-- Iterator list is keeping  all created iterators wihtout cleaning them up
-- alter tree modifies the original.

Merge pull request !377 from h.farahat/end_iterator

Merge pull request !183 from JunhanHu/cpp_sampler

Merge pull request !397 from chenjianping/building-on-windows-3

Merge pull request !296 from StrawNoBerry/ExcludeFV

Merge pull request !396 from zhangbuxue/fix_example_of_controldepend_for_cpu_and_gpu

Merge pull request !398 from penn/fix_example_doc_of_insert_grad_of

Merge pull request !391 from Simson/push-to-opensource

Merge pull request !386 from changzherui/modify-ut