Release google-cloud-vision 0.33.0
- Add ImageAnnotatorClient#batch_annotate_files
- Add AnnotateFileRequest
- Add BatchAnnotateFilesRequest
- Add BatchAnnotateFilesResponse
- Add ImageAnnotatorClient#async_batch_annotate_images
- Add AsyncBatchAnnotateImagesRequest
- Add AsyncBatchAnnotateImagesResponse
- Add AnnotateFileResponse#total_pages
- Add InputConfig#content
- Update documentation