Tree: add getMetaData method for Integer data
Tree: add getMetaData method for Integer data

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