Fastreid

New Features
- Vision Transformer backbone, see config in `configs/Market1501/bagtricks_vit.yml`
- Self-Distillation with EMA update
- Gradient Clip

Improvements
- Faster dataloader with pre-fetch thread and cuda stream
- Optimize DDP training speed by removing `find_unused_parameters` in DDP

New Features

- Multiple machine training support
- [RepVGG](https://github.com/DingXiaoH/RepVGG) backbone
- [Partial FC](projects/FastFace)

Improvements

- Torch2trt pipeline
- Decouple linear transforms and softmax
- config decorator

New Features

- NAIC20(reid track) [1-st solution](projects/NAIC20)
- Multi-teacher Knowledge Distillation
- TRT network definition APIs in [FastRT](projects/FastRT)

Bug Fixes

Improvements