CHANGES
-------

0.2.4 - September 28, 2107.  Update astropy helpers & other infrastructure items
0.2.3 - April 24, 2017.  Update astropy helpers and some minor doc fixes
0.2.2 - Dec 8, 2016: minor bugfixes, first release in a long while.  Version
        actually specified.
0.2.1 - Use scipy.stats.nanmean if np.nanmean unavailable
0.2 - new, faster, iterative chi^2 method.  Works for non-uniform error
0.1 - original version, worked for uniform error
