Lognormal mixture modeling is implemented for
reciprocally retained gene families
The code supports the use both of lambda
rank and of combined rank for rec.ret. data
To be distinguishable, the files relative to
rec.ret. paralogs (i.e. the MCL file and
the Ks file) are named after the rank
type they are produced from (e.g. lambda)
The "extra" methods for paralogs analyses
have been updated to include LMM on
reciprocally retained data