Fix Pillow error, add helpful .gitignore, conform models.md to markdownlint (#459)
Fix Pillow error, add helpful .gitignore, conform models.md to markdownlint (#459)


fastai/course-v3,fastai/course-v3,fastai/course-v3,fastai/course-v3,fastai/course-v3,fastai/course-v3,fastai/course-v3