Added:
- many utility methods for image manipulation and coordinate handling, #268, OCR-D/ocrd_tesserocr#49
bbox_from_pointsbbox_from_xywhbbox_from_polygoncoordinates_for_segmentcoordinates_of_segmentcrop_imagemembernameimage_from_polygonpoints_from_bboxpoints_from_polygonpoints_from_xywhpolygon_from_bboxpolygon_from_x0y0x1y1polygon_from_xywhpolygon_maskrotate_coordinatesxywh_from_bbox
- Spec-conformant handling of AlternativeImage, OCR-D/spec#116, OCR-D/ocrd_tesserocr#33, #284
Changed: