Hook the model loader into the SD_models file.
Add default url/download if checkpoint is not found.
Add matching stablediffusion-models-path argument.
Add message that --ckpt-dir will be removed in the future, but have it pipe to stablediffusion-models-path for now.
Update help strings for models-path args so they're more or less uniform.
Move sd_model "setup" call to webUI with the others.
Ensure "cleanup_models" method moves existing models to the new locations, including SD, and that we aren't deleting folders that still have stuff in them.
Add General x4x3, GeneralWDN x4x3, and AnimeVideo models from newer ESRGAN releases.
Fix issues caused by renaming ESRGAN_tille values to GAN_tile without using an IDE...