add LogAnalyser facility to not calculate stats. closes #543
add LogAnalyser facility to not calculate stats. closes #543

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