* Add comment explaining num_classes

* More comments

* More comments

* Add unittest of libtorch tracing

* Add type annotation of jit unused

* Bug fixes of jit type annotations

* Minor fixes

* Fix ONNX export for panotpic model

The operation `.view_as(an_other_tensor)` is not supported by ONNX, `view(an_other_tensor.size())` is identical and supported. This fix allow to export panoptic models.

* Update test_all.py

Add onnx export test for panoptic model

* fix lint

* fix lint

* Skip test on OOM CI error

* [add] DETR Instance Sesgmentation via Detectron2

* [change] Following @fmassa comments

* [fix] typo

* Update README.md

Add segmentation training script.

* [delete] import detectron2

* [refactor]

* Update d2/detr/detr.py

Co-authored-by: alcinos <nicolas.carion@ens-lyon.fr>

* only plot_util_fixes

* improved log file checking

* whitespace fixes

Fix size bug in padding transform.

* hs dimensions once DEEP_SUPERVISION is False

in case DEEP_SUPERVISION is False, the first dimension of hs is 'missing'

* Fixing hs output to return a consistent tensor dimension within the TransformerDecoder class once DEEP_SUPERVISION is False

* Bug fixes in ONNX export

* Add onnx onnxruntime as requirements

* Add unittest of detr panoptic model onnx export

* Update onnx opset version to 12 to support operator einsum in detr panoptic models

* Fix lint

* The precision of panoptic onnx exported model exceeded the margin of error

Fixes typos in README related to segmentation training

* Update plot_utils.py

* fix lint error.

Bug fix for D2

* Update README with details on segmentation

* Added link to the panoptic notebook
* Added data-preparation + training instructions.

* Fix markdown

(center_x, center_y, h, w) changed to (center_x, center_y, w, h)

* Add torchscript support to panoptic models

* Fix lint

* improve robustness of plot_logs function:
- robustify logs param - checks if list, if not, deep converts to list for plotting.
- expose log name as optional param (log_name = 'log.txt') to avoid internal hard-coded references
- verify directories passed in are valid.  Raise ValueError if not with path to broken directory shown
- added parameter explanations in commments

* whitespace fixes for pylint

* pylint flake8 update for whitespace

* pylint flake8 update for whitespace, last 4 issues

* code pylint missing 2 trailing wspace, fixed

* blank line at end of file removed...

* simplified use case to path/list[path]

* 2 whitespace fixes

* one last whitespace removed

Hub config for panoptic models

* Add torchscript support for hub detection models

* Dummy commit to test CI

* Try trigger CI

* Fix lint

* Update CI to use nightlies

* Add ISSUE_TEMPLATE

* Fix

* Unifying the format of argparse

* Minor fixes

Update panoptic model hashes

* fix IndexError

* fix IndexError