* [Feature] Change option to cfg-option

* add expire date and fix the docs

* modify docstring

* [Fix] Convert SyncBN to BN when training on DP.

* Modify SyncBN2BN.

* Add SyncBN2BN unit test.

* Resolve some comments.

* use mmcv official revert_sync_batchnorm

* Remove local syncbn2bn unit tests.

* Update mmcv version.

* Fix bugs of gather model tools.

* Modify warnings.

* Modify docker mmcv version.

* Update mmcv version table.

* [Fix] Fix iter bug when resuming checkpoint in distributed train

* fix lint error

Signed-off-by: FreyWang <wangwxyz@qq.com>

* Add header for files

* Delete header in config files

* [Refactor]: Unified parameter initialization

* fixed pretrained

* Add  save_best option in eval_hook.

* Update meta to fix best model can not test bug

* refactor with _do_evaluate

* remove redundent

* add meta

Co-authored-by: Jiarui XU <xvjiarui0826@gmail.com>

* [Improvement] Move train_cfg/test_cfg inside model

* fixed config dict

* fixed config dict

* Auto get version info and git hash

* bump 0.5.1 and update doc

* fixed docs

* Add change log

* Add load-from flag

* minor update

Co-authored-by: Jiarui XU <xvjiarui0826@gmail.com>