* update all docs involving color label

* modify usage.md

* usage.md

* Update data_prepare.md

* Update labelme2seg.md

* Update jingling2seg.md

* Update data_prepare.md

* Update data_prepare.md

* modify data_prepare

* improve gray2pseudo_color

* improve dice loss doc

* modify label tool

* support color label

* add hrnet tutorial

* modify annotation stript path

* modify annotation stript path

* modify pspnet cityscapes iou

* Update labelme2seg.md

* Update jingling2seg.md

* update model_builder.py

* update loss_select.md

* init deepglobe_road_extraction.yaml

* update download_mini_deepglobe_road_extraction.py

* update model_builder.py

* fp16_err

* add fp16 and multiple gpus train

* add fp16 and multiple gpus train

* add fp16 and multiple gpus train

* add fp16 and multiple gpus train

* add fp16 and multiple gpus train

* add fp16 and multiple gpus train

* add fp16 and multiple gpus train

* improve create_dataset_list

* update solver_group.md

* add create_dataset_list function

* add pspnet coco model

* update check.py

* Update check.md

* modify data_prepare.md