* 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

* Update download_and_convert_voc2012.py

* add PASCAL VOC2012 download and convert scripts

* modify data_prepare.md

* add create_dataset_list function

* Create create_dataset_list.md

* del .idea

* modify unet_pet.yaml error

* modify yaml

* add create_dataset_list function

* Create create_dataset_list.md

* del .idea

fix hsv_color_jitter bug

* Update finetune_deeplabv3plus.md

* Update finetune_icnet.md

* Update finetune_unet.md

modify test/configs/unet_pet.yaml

Update finetune_unet.md

update finetune_deeplabv3plus.md

模型下载的更改