Make it possible for builtins called with testBI to have    several output arguments, the first of which is the arbiter.
Make it possible for builtins called with testBI to have
   several output arguments, the first of which is the arbiter.



eregon/mozart2,dianacgr/mozart2,dianacgr/mozart2,eregon/mozart-graal,eregon/mozart-graal,dianacgr/mozart2,eregon/mozart2,avisparesearch/Mozart2,Angeldude/mozart2,avisparesearch/Mozart2,mozart/mozart2,mozart/mozart2,layus/mozart2,eregon/mozart-graal,eregon/mozart-graal,mistasse/mozart-graal,mistasse/mozart-graal,eregon/mozart-graal,yjaradin/mozart2,mistasse/mozart-graal,yjaradin/mozart2,eregon/mozart2,Angeldude/mozart2,eregon/mozart-graal,Angeldude/mozart2,layus/mozart2,yjaradin/mozart2,mistasse/mozart-graal,mistasse/mozart-graal,layus/mozart2,mozart/mozart2