Fix checksum tests on 32-bit systems.
Remove unnecessary np.array()
Change order of arguments for `wcs.compare`.
Fix function signature in docs.
Fix #2514: Fix warning message when config option moved to top-level.
Update old 'whatsnew' pages to just link to the versions of those pages in the docs for those versions, which will always be properly rendered for their associated Astropy release.  Left the 0.1 one alone, as there was never really a 'whatsnew' page in Astropy 0.1
Add changes entry.
Fix some minor formatting issues in the documentation.  In some lines on the
examples the commented lines were not prefixed by >>> where it was in other
cases.  I've make all to be after the >>> so it's formatting properly and not
as an output.
Add astropy.cfg to MANIFEST.in
Fix io.ascii common function assert_almost_equal, was doing nothing
Fix mistake in tests revealed by previous commit
Only wrap Longitude angles if some need wrapping
Merge pull request #2533 from mdboom/config/manifest.in

Add astropy.cfg to MANIFEST.in
Update to latest version of astropy-helpers.

The package-template sub-module has been removed, so this should fix issues with affiliated packages installations. Also fixes a bug that was causing packages to get re-built every time, and a bug that meant that astropy_helpers could not be used as a standalone package.
Merge pull request #2535 from astrofrog/update-helpers-2

Update to latest version of astropy-helpers
Don't import IPython
Merge pull request #2484 from mdboom/fits/checksum-failures-32-bit

Fix checksum tests on 32-bit systems.
Add ah_bootstrap.py to MANIFEST.in
Merge pull request #2514 from mdboom/config/warning-message-to-toplevel

Error in configuration deprecation warning
Merge pull request #2505 from mdboom/wcs/compare-argument-order

Change order of arguments for `wcs.compare`.