minor changes to util.py... i thoguht i had merged
minor changes to util.py... i thoguht i had merged

alubbock/pysb-legacy,d-fan/pysb,LoLab-VU/pysb,spgarbet/pysb,jmuhlich/pysb,neurord/pysb,d-fan/pysb,d-fan/pysb,LoLab-VU/pysb,neurord/pysb,spgarbet/pysb,alubbock/pysb-legacy,johnbachman/pysb,pysb/pysb,johnbachman/pysb,spgarbet/pysb,alubbock/pysb-legacy,alubbock/pysb,neurord/pysb,alubbock/pysb-legacy