Standardize how Python version checking is done.
Add changes to io.fits
Add __call__ to Sphinx API docs (fixes #1817)
Make `@deprecated` decorator work for classes.
Fix pickling issues with class deprecation.  Fix Python 2.6 bug.
Implement `InheritDocstrings` metaclass to automatically inherit
docstrings on methods from those in the base class.
Add warning about multiple inheritance.
Move io.votable to use InheritDocstrings
Move units to use InheritDocstrings
Inherit ndarray docstrings in Quantity
Initial commit of the fitshead script

Improved the help text

Improved the help messages and PEP8 compliance

Avoid crashing on a negative HDU extension number

Fixes Python 3 compatibility issue
Added support for EXTNAME/EXTVER HDU accessing and JSON output

removed JSON support; removed os.linesep; tolerate broken pipe errors
removed JSON support; removed os.linesep; tolerate broken pipe errors
Adds support for compressed headers + renamed to fitsheader
Adds support for compressed headers + renamed to fitsheader
Added documentation
Adds fitsheader script and documentation
Adds a test for the fitsheader script
Fixing some broken links of coordinates, convolution, constans, time and io
Fixes sphinx build warnings