tagging final release 1.7.5

Merge pull request #221 from nden/nan-gsc

Fix issue with NaNs in GSC web service responce

Merge pull request #214 from s-goldman/1.7.4rc1

Updated changelog, pin numpy >= 2.0.

Merge pull request #197 from mcara/fix-failing-test-astropy-dlt-fix

Fix failing test due to astropy.wcs fix for distortion look-up table bug

start development

release 1.7.2

tagging release 1.7.1

tagging dev work for 1.7.1

tagging release 1.7.0

tagging for further development