Merge pull request kohya-ss#360 from kohya-ss/dev

fix for merge_lora.py

Merge pull request kohya-ss#339 from kohya-ss/dev

fix an issue with num_workers=0

Update README.md

Merge pull request kohya-ss#278 from kohya-ss/dev

Dev

Add comment about sample generation

Update README.md

Merge pull request kohya-ss#208 from space-nuko/add-optimizer-to-meta…

…data

Add optimizer to metadata

Merge pull request kohya-ss#153 from shirayu/fix_a_typo

Fix a typo

Update README.md

Update README.md