Add Kirkpatrick 2009 evolvability metrics.

One reviewer noted Mark's evolvability metrics that could (easily)
be added to the Chlamy paper. Note, however, that this is based on
the PCA analyses (i.e., both FactoMineR and standard eigen decomp)
rather than the CVC estimated with more complex models that may or
may not work...can easily re-run once the more complex problem is
solved.