Change how jquery.js and jquery.dataTables.js dependencies are handled.
Includes the original source, rather than minified source.  Provides
a configuration option to select where file is loaded from.
Fixes for remote-data tests prior to APE3 work.
Fix some rather large memory leaks in the wcs bindings.
Change allocation in WCS.sub.

Conflicts:
	astropy/wcs/src/wcslib_wrap.c
Add CHANGES entry.
Don't display configuration deprecation warning messages within
`setup.py test`.  Improve warning messages about deprecated
configuration items.
Add regression test for the issue reported in #2003 (which is already fixed by #1775)
fix for deprecated self.naxis1/2
Added dV_comoving function and tests.

The dV_comoving function allows for an easy method of integrating
over a comoving volume. It is useful when, for example,
integrating a function that depends on another function whose
sensitivity changes with redshift.
Renamed function to differential_comoving_volume

Changed relevant doc_strings and tests as well. As discussed at
https://github.com/astropy/astropy/pull/2103.
Changed documentation wording.

Changed docstring and added the change to the CHANGES.rst file.
Also added the function to the __all__ list at the top of funcs.
Changed the return with units method.

In response to comment here:
https://github.com/astropy/astropy/pull/2103#commitcomment-5470863
Changed to long form of steradian.
Updated _get_current function call.

The _get_current() is depreciated so changed to the new:
 _default_cosmology.get()
Fixing doctest failing in construct_table.rst
add a way for io.ascii set how masked values appear on output
Define our own masked class
add documentation for masked in io.ascii and for fill_values in general

closes #2255
closes #2314
fix line continuation in doctest
changes suggested in dicussion, pep8