* Create singan.md

* Create gradient_penalty.py

* add GradientPenalty

* add images for singan document

* add SinGANModel

* add SinGANGenerator

* add SinGANDiscriminator

* Create discriminator_singan.py

* Create generator_singan.py

* Create singan_model.py

* Create empty_dataset.py

* add EmptyDataset

* Create singan_predictor.py

* add SinGANPredictor

* Create singan.py

* create configs for singan

* add inference for singan

* create tipc config for singan

* Create python_singan_results_fp32.txt

* add tipc prepare for singan

* Update test_train_inference_python.md

* Update readme.md

* Update singan.md

* Update singan_model.py

* Update prepare.sh

* Update train_infer_python.txt

* Update prepare.sh

* Revert "add images for singan document"

This reverts commit f45fe5e55a2588611d951ae84d776c90693788df.

* Update singan.md

* update path format in configs

* update year of copyright

* modify the order of import

* Update singan_predictor.py

* update configs for singan

* Update singan_model.py

* modify urls for singan in prepare.sh

* add pretrained weight for singan

* Update singan_model.py

* Update singan.md

* Create English tutorial for SinGAN

* add release note 2.1.0

* fix edvr bug on windows

* update version

* update install docs

* fix train bug on cpu

* fix import and docs