Add docstring for WCS.has_distortion
Remove 2to3 from documentation
Re-add cov report PY2 behavior and tone down wording against 2to3

This partially reverts commit 55c727db73e1b881d2b9fb80cae7ff93bf601b8d.
Split template into python and python parts
Add python template to setup_package.py
Add processing of python template to cython_generator
Adjustment to import python wrapper...

…itself importing the cython extension
Update erfa.pyx
Commit erfa.py
Add "_" in front of erfa functions in cython wrapper
Properly deal with stat_ok
Fix `__all__` in both templates
Update to erfa.py and erfa.pyx
Fix import in erfa tests
pep8 fixes to erfa.py.templ
Update erfa.py, following pep8 fixes
Fix problem where URL is being downloaded for each guess
One more pep8 fix
Allow frame instances to be passed to SkyCoord
Updated documentation