Support file output from FITS diff given path name
Address embray comments, fix UnboundLocalError
Update test_diff.py

Remove extraneous whitespace
Explicitly specify axis for take in order to support multidimensional arrays
Added regression test
Added changelog entry
fix bug in z_at_value
add test checking fix
Change log entry
Merge pull request #2984 from astrofrog/fix-2984

Table join does not work with multidimensional columns
Merge pull request #2985 from josePhoenix/fitsdiff-string-path

Support file output from FITS diff given path name
Move changelog entry to 0.4.3
remove duplicate test code
Merge pull request #2993 from nhmc/z_at_value_fix

Bug fix for cosmology.z_at_value()
Don’t use deprecated luminosity_distance function
Use z_at_value
Reduce tolerance for z calculation in Distance
Added changelog entry