Switch filter API to use string_view
Fix oiiotool output of negative-origin images for formats that don't support it
TIFF: gracefully handle negative origin without asserting in libtiff
Change extract_from_list_string to return the number of values parsed.
IBA warp & rotate, oiiotool --warp --rotate

Warp transforms (with good filtering) an image by a 3x3 transformation
matrix (affine transformations and then some).

Rotate is the special case of arbitrary image rotation.
Slightly more FP tolerance in some tests
rebuild PDF docs