Fix #2685.
Don't fail if user has no HOME or XDG_CONFIG_HOME
Display more information in the warning message.
Fix configuration file hash calculation for universal line endings.
Ensure Table.remove_columns works when given a single column name
Push ellipses a bit further in for time/index.rst for Debian/powerpc,s390x
Fixes outdated documentation
Merge pull request #2685 from mdboom/votable/name-error

Bug: votable.conesearch fails with `NameError: global name 'votable' is not defined`
Removes duplicated bugfix
Merge pull request #2699 from mhvk/table-remove-columns-single-column

Table.remove_columns on a string
Merge pull request #2709 from mhvk/time-doc-fix

0.4rc1: DocTestFailure on  docs/time/index.rst
Merge pull request #2720 from barentsen/fix-skycoord-usage

0.4rc1: conesearch documentation error
Merge pull request #2689 from mdboom/config/no-home-variable

Problems importing astropy when running inside Ipython Notebook
Merge pull request #2706 from mdboom/config/line-endings

Config file md5 calculation broken on Windows 7