Add proper extension to dexseq GFF file.
Add proper extension to dexseq GFF file.

elkingtonmcb/cloudbiolinux,chapmanb/cloudbiolinux,rchekaluk/cloudbiolinux,joemphilips/cloudbiolinux,averagehat/cloudbiolinux,kdaily/cloudbiolinux,AICIDNN/cloudbiolinux,lpantano/cloudbiolinux,heuermh/cloudbiolinux,rchekaluk/cloudbiolinux,kdaily/cloudbiolinux,heuermh/cloudbiolinux,AICIDNN/cloudbiolinux,averagehat/cloudbiolinux,chapmanb/cloudbiolinux,joemphilips/cloudbiolinux,elkingtonmcb/cloudbiolinux,chapmanb/cloudbiolinux,pjotrp/cloudbiolinux,elkingtonmcb/cloudbiolinux,pjotrp/cloudbiolinux,heuermh/cloudbiolinux,heuermh/cloudbiolinux,kdaily/cloudbiolinux,averagehat/cloudbiolinux,rchekaluk/cloudbiolinux,pjotrp/cloudbiolinux,lpantano/cloudbiolinux,joemphilips/cloudbiolinux,AICIDNN/cloudbiolinux,rchekaluk/cloudbiolinux,averagehat/cloudbiolinux,pjotrp/cloudbiolinux,lpantano/cloudbiolinux,elkingtonmcb/cloudbiolinux,kdaily/cloudbiolinux,AICIDNN/cloudbiolinux,joemphilips/cloudbiolinux,chapmanb/cloudbiolinux