matsen/pplacer — pull request #291 by cmccoy (2013-01-07 17:08:18+00:00)
Title: Add qD(T) and qPD(T) to `guppy fpd`

Add diversity measures qD(T) and qPD(T) from [Chao et. al. 2010](http://dx.doi.org/10.1098/rstb.2010.0272), described in equations 4.5 and 4.6, respectively.