Implement FileSystemCache for Nautilus

[sonofmun]

@PonteIneptique So now here.
And it looks like all I would need to do is to comment out https://github.com/OpenGreekAndLatin/leipzig_cts/blob/master/modules/capitains/templates/app.py.erb#L38 and remove the # from https://github.com/OpenGreekAndLatin/leipzig_cts/blob/master/modules/capitains/templates/app.py.erb#L40
Or is it more complex?

[PonteIneptique]

It might be a bit more complexe : you need to make sure puppet variables are declared and rights are alright for the cache folder (and that it exists !)