CHANGES
-------

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
