Implement compatibility with third party rank plugins

[crashzk]

It would be interesting to implement compatibility with rank plugins to show the players rank in the score based on their rank points.

Ranks that could be compatible are:

• Levels Ranks Core
• RankMe Kento

HOW IT WORKS

My servers use Levels Ranks Core, based on their points the rank would automatically appear in the score on his rank, example:

"LevelRanks"
{
    "1"
    {
        "name"      "Silver I"
        "index"     "1"    
        "flag"      "-1"
        "points"    "100"
    }

    "2"
    {
        "name"      "Silver II"
        "index"     "2"    
        "flag"      "-1"
        "points"    "200"
    }

    "3"
    {
        "name"      "Silver III"
        "index"     "3"    
        "flag"      "-1"
        "points"    "300"
    }

[...]
}

That is, it reached 100 points shows the Silver I rank, it reached 200 points shows the Silver II rank and so on.

[KillStr3aK]

Sounds good, I'm busy at the moment but support will be implemented for both system!