* update video download and infer

* update video_infer.py

* fix humanseg postprocess

* update visualdl

* updata optflow

* rm humanseg_server_quant

update README.md

Humanseg

* add RemoteSensing

* optimize data clip and normalize method for remote sensing

* add README.md

* polish README.md, optimize main.py and transforms.py, add transforms.md

* add demo dataset

* add create_dataset_list tool, requirements.txt

* add channel-by-channel normalize and clip, remove RemoteSensing import