Support Time in table hstack, vstack and join - #6888

Hi there @taldcroft 👋 - thanks for the pull request! I'm just a friendly 🤖 that checks for issues related to the changelog and making sure that this pull request is milestoned and labeled correctly. This is mainly intended for the maintainers, so if you are not a maintainer you can ignore this, and a maintainer will let you know if any action is required on your part 😃.

Everything looks good from my point of view! 👍

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@mhvk - this is ready for final review now, along with #6028. If you won't have time then let me know.

This is not to be backported to the v3.0.x branch as the coordinators decided this would need more testing before it makes it to a release.

@taldcroft - now that #6028 is merged, can you rebase this?

@astrofrog - yes, in fact I rebased already a few days ago, so there are now just 6 commits.

The circleci fail is unrelated:

________________________________ test_2d_model _________________________________
[gw0] linux -- Python 3.6.4 /opt/python/cp36-cp36m/bin/python

    @pytest.mark.skipif('not HAS_SCIPY')
    def test_2d_model():
        # 2D model with LevMarLSQFitter
        gauss2d = models.Gaussian2D(10.2, 4.3, 5,2, 1.2, 1.4)
        fitter = fitting.LevMarLSQFitter()

Is this fixed in the most recent master?

And of course I will fix the changelog to put into 3.1.

Is this fixed in the most recent master?

I think so, I increased the tolerance in this test a couple of days ago

@taldcroft @mhvk - I see this is ready for review for a while, do you have any update on it?

@bsipocz - I have rebased again and addressed the review comments.

From my perspective this is good to go (pending tests of course).

Thanks @mhvk!