* add onnx support to roi_align and roi_pool
* add softnms ort support
* fix for lint
* format cpp code with clang-format:google
* add new empty line to the end of head files in onnxruntime
* update to pytorch1.7
* add test of softnms to onnxruntime
* fix for lint
* remote print in ops/info.py
* change import order, fix for flake8
* fix include
* add assert torch>=1.7.0
* [doc]: add document for onnxruntime custom operator
* update onnxruntime version to v1.5.1 for softnms
* remove doc menu
* Resolve lint for markdown
* resolve naming style in onnxruntime_op.md
* Use old cpp apis, optimize test_onnx.py
* Fixing strings in tests/test_ops/test_onnx.py
* code format with yapf
* fix soft_nms parrot
* add import in onnxruntime setup, avoid conflict
* fix doc and add assert
* change cpp guard
Co-authored-by: maningsheng <maningsheng@sensetime.com>
q.yao