Imaginairy

- feature: use different default steps and image sizes depending on sampler and model selected
- fix: 110 use proper version in image metadata
- refactor: solvers all have their own class that inherits from ImageSolver
- feature: 🎉🎉🎉 Stable Diffusion 2.0
- `--model SD-2.0` to use (it makes worse images than 1.5 though...)
- Tested on macOS and Linux
- All samplers working for new 512x512 model
- New inpainting model working
- 768x768 model working for all samplers except PLMS (`--model SD-2.0-v `)

- feature: add progress image callback

- fix: support larger images on M1. Fixes 8
- fix: support CPU generation by disabling autocast on CPU. Fixes 81

- feature: 🎉 inpainting support using new inpainting model from RunwayML. It works really well! By default, the
inpainting model will automatically be used for any image-masking task
- feature: 🎉 new default sampler makes image generation more than twice as fast
- feature: added `DPM++ 2S a` and `DPM++ 2M` samplers.
- feature: improve progress image logging
- fix: fix bug with `--show-work`. fixes 84
- fix: add workaround for pytorch bug affecting macOS users using the new `DPM++ 2S a` and `DPM++ 2M` samplers.
- fix: add workaround for pytorch mps bug affecting `k_dpm_fast` sampler. fixes 75
- fix: larger image sizes now work on macOS. fixes 8

- feature: allow dynamic switching between models/weights `--model SD-1.5` or `--model SD-1.4` or `--model path/my-custom-weights.ckpt`)
- feature: log total progress when generating images (image X out of Y)

- feature: stable diffusion 1.5 (slightly improved image quality)
- feature: dilation and erosion of masks
Previously the `+` and `-` characters in a mask (example: `face{+0.1}`) added to the grayscale value of any masked areas. This wasn't very useful. The new behavior is that the mask will expand or contract by the number of pixel specified. The technical terms for this are dilation and erosion. This allows much greater control over the masked area.
- feature: update k-diffusion samplers. add k_dpm_adaptive and k_dpm_fast
- feature: img2img/inpainting supported on all samplers
- refactor: consolidates img2img/txt2img code. consolidates schedules. consolidates masking
- ci: minor logging improvements