Add a point to coding style docs to follow existing subpackage style [skip ci]
Simplify wording and remove implication of 'preferences' [skip ci]
Support wcslib 4.24 in tests
Fix LooseVersion comparison.
Update WCS_VERSION in our local build.
Don't override system WCSVERSION
initial checkin of new approach
just use subtracted angle
screwed up relative imports
oops, had double units on roll angle
 update docstring
Make a single unique csv reader/writer function
added galactocentric import to init
added tests for galactocentric
added a todo about #3217
Add section on related Astropy packages to the docs
Copy photutils.utils functions
Update imports for new functions
Replace fix_prf_nan with mask_to_mirrored_num
Add tests for mask_to_mirrored_num