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in the file names to make it so there won't ever be any name conflicts
in the cropped images.

now the output images are always the same dimensions but the objects scale changes.

totally removing it, and also made --stats print the number of non-ignored
boxes.

always going to be required for imglab.

small window when the first image was bigger than the screen.

to change the label for a rectangle.

--HG--
rename : tools/imglab/src/image_dataset_metadata.cpp => dlib/data_io/image_dataset_metadata.cpp
rename : tools/imglab/src/image_dataset_metadata.h => dlib/data_io/image_dataset_metadata.h

--HG--
rename : tools/imglab/src/convert_pascal_voc.cpp => tools/imglab/src/convert_pascal_xml.cpp

imglab annotation format.