Minimised deprectated member usage in TreeStatLogger. Issue #26.
Minimised deprectated member usage in TreeStatLogger. Issue #26.

tgvaughan/beast2,CompEvol/beast2,tgvaughan/beast2,CompEvol/beast2,CompEvol/beast2,tgvaughan/beast2,Anaphory/beast2,Anaphory/beast2,tgvaughan/beast2,Anaphory/beast2,CompEvol/beast2,Anaphory/beast2