v1.0.1, 6 May, 2013 -- Fixed traceback for iterable input
v1.0.0, 5 April, 2013 -- Public release
v0.2.0, Mar 2013 -- Split out of larger package, cleaned up for public release
v0.1.0, Sep 2011 -- Implemented for use use in "On Galaxies and
  Homology" Novak et. al. Monthly Notices of the Royal Astonomical
  Society, 424:635 (2012) (http://arxiv.org/abs/1205.2533)