GitLab

* add instance statistics before and after through pipeline

* add docstring

* support showing cat-wise instance statistics

* show all statistics of the dataset

* small fix

* polish code

* show table

* small fix

* rename some varibles

* fix nuscenes training bug

* update kitti_dataset docstring

* update nuscenes_dataset docstring

* fix lint and modifty docstring

* fix nuscenes datasets

* fix fcos3d bugs

* update data flow and ut

* update ut

* update code

* fix mapping bug

* fix comments

* fix dataset sweeps

* fix

* fix cfg

* fix comments

* fix mmcv file client

* fix set_env

* fix mmcv file load and dump