suppress "Overwrite (Y/N)?" message when BEAST runs in console. fixes #261
suppress "Overwrite (Y/N)?" message when BEAST runs in console. fixes #261

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