oiiotool --metamerge gives output merged metdata of all inputs
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Most oiiotool commands copy metadata to their result from their first input. Using `--metamerge` causes >2 arity image ops to try to merge metadata from all of its input images (though earlier arguments have precedence in the case of name clashes). Also make IBAprep utility have a bitfield flag for the same purpose, though it's not the mechanism we use for the oiiotool calls. Along the way, added `ParamValueList::merge()` merges two PVLs together. Also fixed a couple typos and updated the oiiotool --help message to point to the new online docs.
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Most oiiotool commands copy metadata to their result from their first
input. Using
--metamergecauses >2 arity image ops to try to mergemetadata from all of its input images (though earlier arguments have
precedence in the case of name clashes).
Also make IBAprep utility have a bitfield flag for the same purpose,
though it's not the mechanism we use for the oiiotool calls.
Along the way, added
ParamValueList::merge()merges two PVLs together.Also fixed a couple typos and updated the oiiotool --help message to point
to the new online docs.