Update gists urls and done some cleaning up in node.sh

Github decided to change the gist urls from for example this:
`https://gist.github.com/fideloper/3751524/raw/.gitconfig`
to
`https://gist.githubusercontent.com/fideloper/3751524/raw/.gitconfig`

Github has set a redirect, but that doesn't work at it should. Instead of containing the .gitconfig it contained the html with the redirect warning.

This also solves #136