Merge pull request !4595 from wangzhe/master

Merge pull request !4609 from chenzhongming/new_master

Merge pull request !4617 from zhaodezan/master

Merge pull request !4630 from EricZ/md_tensor_from_mem

Merge pull request !4367 from MahdiRahmaniHanzaki/cutmix

Merge pull request !4623 from 王东旭/opencl_winograd

Merge pull request !4612 from chenfei_mindspore/master

Merge pull request !4610 from gukecai/revert

Merge pull request !4611 from lixian/master

Merge pull request !4615 from chenzupeng/master-lite

Merge pull request !2969 from BowenK/fix_reduce_all

Merge pull request !4608 from zhaozhenlong/lite/issue/concat_int8_mem_leak_fix

Merge pull request !4613 from sunsuodong/fix_space_to_depth

Merge pull request !4561 from ZhangQinghua/master1

Merge pull request !4588 from songhonglei413/roi

Merge pull request !4411 from wangminggui/master

Merge pull request !4603 from pengyongrong/batchnorm

Merge pull request !4593 from zhaozhenlong/lite/issue/transpose_mean_concat_fp16_fp32

Merge pull request !4291 from jinyaohui/master

Merge pull request !4503 from chenjianping/lite_dev

This reverts commit adb6ff6c78.

Merge pull request !4584 from sunsuodong/fix_topkv2_parser

Merge pull request !4579 from zyli2020/fix_sigmoid_cross_entropy_bug

Merge pull request !4506 from liuzhongkai/caffe_prelu

Merge pull request !4599 from liuxiao93/nn-CentralCrop

Merge pull request !4548 from hangq/master

Merge pull request !4218 from yelihua/temp-dev

Merge pull request !4598 from zhangbuxue/support_axis_is_None_for_all_and_any_in_graph_mode

Merge pull request !4596 from cjh9368/fp16

Merge pull request !4591 from wangmin0104/master

Merge pull request !4566 from huanghui/scatter-nd-update-cpu-kernel