Avoid downloads if reference file already present
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joemphilips/cloudbiolinux,chapmanb/cloudbiolinux,AICIDNN/cloudbiolinux,rchekaluk/cloudbiolinux,chapmanb/cloudbiolinux,kdaily/cloudbiolinux,pjotrp/cloudbiolinux,rchekaluk/cloudbiolinux,elkingtonmcb/cloudbiolinux,averagehat/cloudbiolinux,AICIDNN/cloudbiolinux,kdaily/cloudbiolinux,elkingtonmcb/cloudbiolinux,pjotrp/cloudbiolinux,chapmanb/cloudbiolinux,joemphilips/cloudbiolinux,AICIDNN/cloudbiolinux,rchekaluk/cloudbiolinux,averagehat/cloudbiolinux,pjotrp/cloudbiolinux,pjotrp/cloudbiolinux,heuermh/cloudbiolinux,averagehat/cloudbiolinux,heuermh/cloudbiolinux,averagehat/cloudbiolinux,rchekaluk/cloudbiolinux,kdaily/cloudbiolinux,lpantano/cloudbiolinux,lpantano/cloudbiolinux,elkingtonmcb/cloudbiolinux,heuermh/cloudbiolinux,heuermh/cloudbiolinux,joemphilips/cloudbiolinux,elkingtonmcb/cloudbiolinux,AICIDNN/cloudbiolinux,kdaily/cloudbiolinux,lpantano/cloudbiolinux,joemphilips/cloudbiolinux,chapmanb/cloudbiolinux