Include an example of how to skip all doctests in a module
Should somewhat fix or at least improve the situation reported in
https://github.com/astropy/astropy/issues/2305 by ensuring that the
method (_ImageBaseHDU.update_header) responsible keeping an HDU's header
in sync with the data it represents, also makes the necessary updates to
ensure that the header contains the correct BZERO value for
pseudo-unsigned integers.
Upgrade to wcslib 4.22
Fix a couple sets of tests in modeling. This has two problems: One was the use of parameters.values() in a context where the order of the parameter values *does* matter. The fact that it was working before was only by luck.  The other problem was that it modified global state, causing subsequent test executions to break.
Make ellipsoid a property with a setter; add tests; use _new_view
Rename calcFootprint to calc_footprint. Add an optional boolean keyword center which controls whether to use the center of the corner of the pixel.
fix docstrings
Reset the master_transform_graph after this test; included note that this should be redone in the context of #2347
Add docstring to ellipsoid
rewrite calcFootprint to call calc_footprint
correct typo in docstrings
Further tests/changes following comments by @cdeil
Remove unnecessary platform.architecture() call.  While it's true this workaround is only needed for 64-bit OSX systems, that comprises the vast majority of OSX systems in use.  The workaround does not add significant overhead for 32-bit systems (and is not even likely to be encountered since most 32-bit systems won't be able to handle such large arrays to begin with).
add tests
added an entry in CHANGES
Fix use of 'callable' function with Python 3.1
Ignore any user config file, even when running astropy.test()
Merge pull request #2352 from astrofrog/fix-python-31

Fix use of 'callable' function with Python 3.1
Miscellaneous things caught be clang-analyzer.
Fix allocation of temporary buffer in `Wcsprm.set`.  The number of axes
returned may be up to twice as many as requested.  Rather than being
smart about it, just allocate the buffer to be twice as large -- these
are very small buffers in any case (one int per dimension).