Update troubleshooting.md for windows users
Update troubleshooting.md for windows users

Include a detailed process of installing hydrogen (fixing node-gyp error) for windows user.
Include up-to-date guide (e.g. command, packages installed) during the installation, and hope this can save people the troubles.
xanecs/hydrogen,nteract/hydrogen,lgeiger/hydrogen,n-riesco/hydrogen,rgbkrk/hydrogen,nteract/hydrogen