Travis: Fetch BioNetGen from mmbios.org instead of google code
Travis: Fetch BioNetGen from mmbios.org instead of google code

jmuhlich/pysb,alubbock/pysb,johnbachman/pysb,pysb/pysb,LoLab-VU/pysb,johnbachman/pysb,LoLab-VU/pysb