Update configs/_base_/datasets/coco_detection.py, configs/_base_/datasets/coco_instance.py, configs/_base_/datasets/coco_instance_semantic.py

* add Localization Distillation for Object Detection https://arxiv.org/abs/2102.12252

* fix lint

* fix lint

* fix lint

* fix lint

* fix lint

* fix config

* add kd detector

* edit loss name

* overide setattr but failed

* move init_detector into init

* seperate ld and gfocal, fix unused param error

* small fix

* small fix

* add test, reload magic function, create kd_loss.py

* del teacher model warnings

* fix reference

* add ignored bbox test fix docstring

* small fix

* docstring fix

* change names

* fix

* fix

* fix test

* fix import

* fix

* docstring fix

* fix

* retest

* add test

* docstring fix

[Refactor]: Support batch inference traceable by ONNX in SSD, YOLOv3, FSAF, RetinaNet, and FCOS (#4699)

* Support batch infer in RetinaNet

* Suport batch multiclass_nms

* Revert multiclass_nms

* Fix api deprecated warning

* do not repeat anchors

* Move img_shapes

* Update Yolov3

* Support FCOS

* Support RPN

* Fix RPN topk_inds error

* make batch exportable to onnx for yolohead

* make fcos_head exportable to onnx with batch dim

* Support ATSS

* Support CornerNet and centripetalNet

* Update RetinaNet and delta_xywh

* Remove ugly code

* Remove ugly code of FCOS

* Remove ugly code of ATSS/YOLOV3

* Support RPN and revert bbox_head

* expand anchors to batch and remove BG class when use deploy_nms_pre

* Update

* Use dim=-1 instead of dim=2

* Rename anchor_head method

* Keep the original format output when nms is not use

* Rename method and unified code style

* Fix paa_head and unittest

* Fix FASF onnx export error

* Fix error

* fix single stage img_shapes for onnx

* move conf_thr

* fix rpn_head for onnx

* Add distance2bbox unittest

* Remove TODO

* Fix RPN

* Update docstrs

Co-authored-by: maningsheng <maningsheng@sensetime.com>

* add cfg

* add cfg

* fix typo

* fix pad

* fix test pad

* add readme

* modify by comments

* fix typo

* rpn head refactor

* guided anchor

* add deprecate warning

* add more warning for set ori augs

* fix unitest

* change base

* cascade rpn

* cornernet and centri

* grid frcnn ok

* ga anchor ok

* legacy ok

* pisa ok

* tridnet ok

* fix tutorals

* use ConfigDict

* Add type of runner in configs

* fix missing config

* support convert voc to cocoformat json

* modify according to comments

* sup customize runner

* fix typo

* use build runner

* minor fix

* modify according to comments

* add an assertion

* swap order

* fix tutorial

* Fix unittest

* Add COCO-Stuff docs

* Remove spaces

* Add paper conference link and mmcv install docs

* Update contributing

* fix num_classes and minor

* update converted models