Automatic samp-servers.net server announcement

[Southclaws]

I may as well integrate two of my projects!

This should load info from a key such as listing inside the samp.json file and post it to http://api.samp.southcla.ws so users can take advantage of the better features of that list such as banner images and search tags.

Example:

{
    "gamemodes": [
        "mygame"
    ],
    "plugins": [
        "mysql",
        "streamer",
        "sscanf",
        "whirlpool",
        "filemanager"
    ],
    "hostname": "My Server",
    "maxplayers": 75,
    "port": 7777,
    "listing": {
        "description": "My awesome server is really cool!",
        "banner": "http://i.imgur.com/nf8923hg.jpg"
    }
}