addon manager - dedup directories
addon manager - dedup directories

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