Inpainting model

• Add description for all models
• Create MADF-GAN network

Availible models

• Fine-grained image inpainting https://arxiv.org/abs/2002.02609
• Inpainting challenge top 2 model with 2 generators https://arxiv.org/abs/2010.01110
• Partial convolution U-NET https://arxiv.org/abs/1804.07723