Merge pull request #2426 from mdboom/config/fixups-post-APE3

Remote test failures due to config changes
Merge pull request #2424 from hamogu/fillmasked

Add a way for io.ascii to set how masked values appear on output
Merge pull request #2103 from jbwhit/feature-comoving-volumeelement-addition

Added dV_comoving function and tests.
Merge pull request #2445 from nden/wcs-naxis

fix for deprecated self.naxis1/2
Improve error handling for bad column select
Merge pull request #2020 from mdboom/misc/jquery-extern

Change how jquery.js and jquery.dataTables.js dependencies are handled.
Merge pull request #2003 from embray/issue-2003

units: quantity bug with adding units to an array view?
Merge pull request #2440 from mdboom/wcs/memory-leaks

Fix memory leaks in the wcs bindings
Update CHANGES.rst

Fix backticks
Update year in copyright notice
Merge pull request #2446 from migueldvb/copyright

Update year in copyright notice
Deprecate functional interface to cosmology
update docs to avoid functional cosmology use
add changelog/what's new about deprecating cosmology functions
fix broken test due to deprecation being in `funcs` namespace
fix indentation typo in whatsnew
Switch to using new-style default_cosmology
Partially clean up the default/current discussion
Removed differential_comoving_volume convinience function
Whitespace sanitization