models/readme.md

models:

1. realisticVisionV20_v20 from https://civitai.com/models/4201/realistic-vision-v20
2. revAnimated_v11 from https://civitai.com/models/7371/rev-animated
3. gmflow_sintel-0c07dcb3 from https://github.com/haofeixu/gmflow