Merge pull request !4921 from chentingting/gcn_readme

Merge pull request !4818 from huanghui/scatter-nd-update-cpu-kernel

Merge pull request !4936 from wangminggui/master

Merge pull request !5049 from sunsuodong/fix_arm32_comple

Merge pull request !5006 from ling/deconv

Merge pull request !5025 from zhaizhiqiang/master

Merge pull request !5042 from liuzhongkai/delete_caffe_prelu

Merge pull request !4994 from liuchao/master

Merge pull request !5010 from sunsuodong/batch_norm_fp16

Merge pull request !5040 from yeyunpeng2020/master

Merge pull request !5003 from VectorSL/opt-transpose

Merge pull request !4982 from zhouyaqiang0/master

Merge pull request !4888 from hanyang/master

Merge pull request !4932 from liuxiao93/Add-CropAndResize-for-old-backend

Merge pull request !4962 from 徐安越/master

Merge pull request !4988 from wukesong/lenet-mkdify

Merge pull request !5029 from zichun_ye/fix_custom_ops

Merge pull request !5016 from gengdongjie/master

Merge pull request !5022 from yeyunpeng2020/master

Merge pull request !5028 from zhangxinfeng3/master

Merge pull request !4826 from zhaozhenlong/lite/issue/fp16_softmax_activation

Merge pull request !4900 from liuzhongkai/bias_add1

Merge pull request !5027 from songhonglei413/roi

update dtype for device

delete used funcs

Merge pull request !5020 from lianliguang/master

Merge pull request !4813 from gukecai/parallel-ctrl

Merge pull request !5013 from hexia/master

Merge pull request !5021 from liuwenhao/master