Follow DEDIS/master updates

[ineiti]

This commit updates the code to work with the latest updates from the DEDIS/master branch. Now when we have new commits, we can also open PRs against the DEDIS/master upstream.

The first commit is not worth looking into, it's a perl -pi -e followed by goimports -w ..
Just look at the second commit.

Closes #57

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[PascalinDe]

LGTM