add message to link clock with different trees in BEAUti #557
add message to link clock with different trees in BEAUti #557

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