* add wav2lip trainning code

* fix some bugs

* update configs

* fix some bug

* add esrgan model, refine codes

* Integrate with visualdl
* visualdl: add doc and control paramter
* visual dl: move import, add install doc

* add some custom gan models

* fix import and docs

* fix docs

* refine codes docs

* fix pix2pix to_tensor

* fix apps

* add face_parse predictor in apps

* update psgan pretrained model link in the tutorial doc

* Refine some docs
* Update docs/en_US/data_prepare.md

* refine codes docs

* refine code

* test

* fix apps

* update readme

* rm unused code

* fix apps output when input is image

* clean code

* update requirements.txt