* refine duplicate frames and fix some bugs

* add face_parse predictor in apps

* remove duplicate frames and keep timestamp, fix psgan docs

* update Readme

* add art model of deoldify

* update demo

* update psgan pretrained model link in the tutorial doc

* Update README.md
* put jpeg center

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

* Update README
* Change docs dir to en_US and zh_CN
* Add paper reference
* Fix link

* refine codes docs

* add psgan and fom tutorial doc

* add video restore tutorial

* Add doc for Apps and refine some code
* Add how to switch cpu and gpu

* add docs

* update

* Add contribute doc
* Fix comments