add method to BeautiAlignmentProvider to facilite scripting. fixes #693
add method to BeautiAlignmentProvider to facilite scripting. fixes #693

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