Fix typo in doctest
If running in an msys shell, use the /home/embray environment variable set in that shell to find the user's home.  The surest way to determine this is if the MSYSTEM environment variable is set (it doesn't matter what it's set to).  Obviously this isn't foolproof but there are few better alternatives (one might be to try calling 'uname').
Add function to calculate inverse of cosmology function and tests
Alternative fix for #1908.  Don't display scientific notation in sexagesimal.
Update CHANGES.rst
Fix #1766: Use Table's repr for io.votable.tree.Table
Add a CHANGES entry
It doesn't make to test this for Unicode guidelines.
Fix typo
Update CHANGES.rst

Just for consistency with previous releases, I usually make this a "misc" section :)
Raise a NotImplementedError when fitting composite models.
clarify error message
add changelog entry
use correct PR number
Fix issue where supplying None for header_start causes read failure
Add test of reading with header_start=None for NoHeader
Merge pull request #1913 from mdboom/coordinates/sexagesimal-exponential

Don't display exponential notation in sexagesimal notation
Merge pull request #1766 from mdboom/vo/table-repr

Improve astropy.io.votable.tree.Table representation
Provide suggestions when an exact unit match can not be found.
Add Returns clause to docstring