Invert acled scores

[timlinux]

Currently the scale is set like this:

    event_scores = {
        "Battles": 0,
        "Explosions/Remote violence": 1,
        "Violence against civilians": 2,
        "Protests": 4,
        "Riots": 4,
    }

So I will update it to look like this rather:

    event_scores = {
        "Battles": 4,
        "Explosions/Remote violence": 3,
        "Violence against civilians": 2,
        "Protests": 1,
        "Riots": 1,
    }