CI only on master branch from now on.
CI only on master branch from now on.

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