explain branch diff

Author: csepulv

README.md

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 Code repo for post on freeCodeCamp.
 
 https://medium.freecodecamp.com/building-an-electron-application-with-create-react-app-97945861647c#.ze6c9qin1
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+This branch uses `npm start` instead of `npm run dev'. Details are in this [pull request](https://github.com/csepulv/electron-with-create-react-app/pull/2)