Add gameinfo to player state

[sirsquidness]

When user is in a game, extra state is returned on the player object - here is an example response, unimportant crap removed for conciseness:

{
    "response": {
        "players": [
            {
                "steamid": "{redacted}",
                "communityvisibilitystate": 3,
                "profilestate": 1,
                "personaname": "{redacted}",
                "lastlogoff": {redacted},
                "profileurl": "{redacted}/",
                "avatar": "{redacted}",
                "avatarmedium": "{redacted}",
                "avatarfull": "{redacted}g",
                "personastate": 3,
                "primaryclanid": "{redacted}",
                "timecreated": {redacted},
                "personastateflags": 0,
                "gameextrainfo": "Spelunky",
                "gameid": "239350",
                "loccountrycode": "AU"
            }
        ]

    }
}