Introducing Linter, changing to better variables, removing redundant variables

[maxspahn]

Clears variable, adds documentation and introduces linting.

[maxspahn]

@GijsGroote You might look at this, too see whether you approve of these changes.

[GijsGroote]

I will take a look asap, which is next monday

[GijsGroote]

Ah, this helps me learn how this repo is intended to work. I do not yet have a large opinion on the commits you've created here because I am still in a learning phase for this one.