Merge pull request !4291 from jinyaohui/master

Merge pull request !4503 from chenjianping/lite_dev

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

Merge pull request !4580 from guozhijian/add_test_case_for_padded

Merge pull request !4567 from 陶云浩/lite

Merge pull request !4586 from hangq/cafedead

Merge pull request !4558 from magemomou/my/work

Merge pull request !4583 from 张学同/to_merge

Merge pull request !4458 from zyli2020/change_wide_and_deep_model_zoo_script

Merge pull request !4573 from huanghui/unsorted-segment-sum-fission-pass

Merge pull request !4549 from zhaozhenlong/lite/op/fp16/concat

Merge pull request !4550 from zhaozhenlong/lite/op/fp16/transpose_mean_concat

Merge pull request !4539 from zhaozhenlong/lite/ops/fp16/transpose

Merge pull request !4575 from fuzhiye/tmp

Merge pull request !4514 from Margaret_wangrui/refactor_CreateNewCNode

Merge pull request !4454 from zjun/fix_int8_print

Merge pull request !4547 from ling/deconv

Merge pull request !4574 from xutianchun/quant_st

Merge pull request !4353 from lyvette/tflite_parser

Merge pull request !4556 from 张学同/to_merge

Merge pull request !4568 from cjh9368/fp16