* [Feature] Support MaskFormer(NeurIPS'2021) in MMSeg 1.x

* add mmdet try except logic

* refactor config files

* add readme

* fix config

* update models & logs

* add MMDET installation and fix info

* fix comments

* fix

* fix config norm optimizer setting

* update models & logs & unittest

* add docstring of MaskFormerHead

* wait for mmdet 3.0.0rc4

* replace seg_mask with seg_logits & add docstring for batch_input_shape

* use mmdet3.0.0rc4

* fix readme and modify config comments

* add mmdet installation in pr_stage_test.yml

* update mmcv version in pr_stage_test.yml

* add mmdet in build_cpu of pr_stage_test.yml

* modify mmdet& mmcv installation in merge_stage_test.yml

* fix typo

* update test.yml

* update test.yml

* add img_padding_size

* minor change

* add pad_shape to data_samples

* [Enchancement] Delete mmcls in runtime.txt in dev-1.x

* fix mmcv minimal version

[Feature] Add ResizeShortestEdge transform

[Enhance] Make scipy as a default dependency in runtime in dev-1.x

[Doc] Translate the visualization.md

[Fix] Add ``data`` string in .gitignore file in dev-1.x branch

[Fix] Fix KNet IterativeDecodeHead bug in dev-1.x branch

[Fix] Fix ignore class id from -1 to 255 in BaseSegDataset in 1.x

Fixe the bug in the visualization step.

[Enhancement] Support padding in testing

[Fix] Fix typo of BaseSegDataset docstring