fix(OfflinePlugin): fixes #669 (#773)
fix(OfflinePlugin): fixes #669 (#773)

set relativePaths: false in webpack.prod.babel/js
Note: I was unable to reproduce the issue described in #669,
so unable to confirm fix.
romanvieito/ball-simpler,likesalmon/likesalmon-react-boilerplate,haxorbit/chiron,abasalilov/react-boilerplate,samit4me/react-boilerplate,abasalilov/react-boilerplate,s0enke/react-boilerplate,AnhHT/react-boilerplate,gtct/wallet.eine.com,ipselon/react-boilerplate-clone,gihrig/react-boilerplate,gtct/wallet.eine.com,Dattaya/react-boilerplate-object,Proxiweb/react-boilerplate,w01fgang/react-boilerplate,s0enke/react-boilerplate,JonathanMerklin/react-boilerplate,Dmitry-N-Medvedev/motor-collection,codermango/BetCalculator,JonathanMerklin/react-boilerplate,pauleonardo/demo-trans,ipselon/react-boilerplate-clone,mmaedel/react-boilerplate,be-oi/beoi-training-client,rlagman/raphthelagman,Demonslyr/Donut.WFE.Customer,TheTopazWombat/levt-2,pauleonardo/demo-trans,shiftunion/bot-a-tron,tomazy/react-boilerplate,Dmitry-N-Medvedev/motor-collection,kaizen7-nz/gold-star-chart,romanvieito/ball-simpler,Jan-Jan/react-hackathon-boilerplate,perry-ugroop/ugroop-react-dup2,Dattaya/react-boilerplate-object,Proxiweb/react-boilerplate,gtct/wallet.eine.com,KarandikarMihir/react-boilerplate,gtct/wallet.eine.com,Jan-Jan/react-hackathon-boilerplate,AnhHT/react-boilerplate,likesalmon/likesalmon-react-boilerplate,KarandikarMihir/react-boilerplate,w01fgang/react-boilerplate,kossel/react-boilerplate,shiftunion/bot-a-tron,chaintng/react-boilerplate,gihrig/react-boilerplate-logic,mxstbr/react-boilerplate,Demonslyr/Donut.WFE.Customer,gihrig/react-boilerplate,blockfs/frontend-react,be-oi/beoi-training-client,mxstbr/react-boilerplate,mmaedel/react-boilerplate,mikejong0815/Temp,Proxiweb/react-boilerplate,haithemT/app-test,gihrig/react-boilerplate-logic,kaizen7-nz/gold-star-chart,blockfs/frontend-react,chaintng/react-boilerplate,Dmitry-N-Medvedev/motor-collection,TheTopazWombat/levt-2,mikejong0815/Temp,perry-ugroop/ugroop-react-dup2,tomazy/react-boilerplate,codermango/BetCalculator,react-boilerplate/react-boilerplate,Dmitry-N-Medvedev/motor-collection,react-boilerplate/react-boilerplate,kossel/react-boilerplate,haxorbit/chiron,haithemT/app-test,rlagman/raphthelagman,samit4me/react-boilerplate,s0enke/react-boilerplate