Make build_reference_wcs more general #173
Merged
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The new function
updatewcs.astrometry_utils.build_reference_wcs
originally only worked with a single file as input. This prevented it from being used for creating the tangent plane definition for a mosaic or set of dithered observations.The simple changes provided here simply allow this function to accept a list of either filenames or HDUList objects as input in addition to a single filename or HDUList. The docstring was also updated to reflect this change.