Fixed segfault in CParser __reduce__ method
Disabled multiprocessing for Windows tests
Warn when parallel feature is enabled on Windows
Changed windows exception to an error and made tests xfail
Fixed minor problems with parallel keyword
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
Added a new function to convert SkyCoord to pixel coordinates
Added missing imports
Add origin parameter
Added pixel_to_skycoord and unit test
Fix instantiation of SkyCoord
Implement mode option to select between full transformation (including distortions) and pure WCS. Extend tests.
Added changelog entry
Made has_distortion a property
Minor rewording