Trackmania callbacks

# Available callbacks:

- TrackMania.PlayerConnect(string Login, bool IsSpectator);
- TrackMania.PlayerDisconnect(string Login);
- TrackMania.PlayerChat(int PlayerUid, string Login, string Text, bool IsRegistredCmd);
- TrackMania.PlayerManialinkPageAnswer(int PlayerUid, string Login, int Answer);
  difference with previous TM: this is not called if the player doesn't answer, and thus '0' is also a valid answer.
- TrackMania.Echo(string Internal, string Public);
- TrackMania.ServerStart();
- TrackMania.ServerStop();
- TrackMania.BeginRace(SChallengeInfo Challenge);

      	struct SChallengeInfo
      	{
      		string Uid;
      		string Name;
      		string FileName;
      		string Author;
      		string Environnement;
      		string Mood;
      		int BronzeTime;
      		int SilverTime;
      		int GoldTime;
      		int AuthorTime;
      		int CopperPrice;
      		bool LapRace;
      		int NbLaps;
      		int NbCheckpoints;
      	}

- TrackMania.EndRace(SPlayerRanking Rankings[], SChallengeInfo Challenge);

      	struct SPlayerRanking {
      		string Login;
      		string NickName;
      		int PlayerId

      		int Rank;
      		int BestTime;
      		int[] BestCheckpoints;
      		int Score;
      		int NbrLapsFinished;
      		double LadderScore;
      	}

- TrackMania.BeginChallenge(SChallengeInfo Challenge, bool WarmUp, bool MatchContinuation);
- TrackMania.EndChallenge(SPlayerRanking Rankings[], SChallengeInfo Challenge, bool WasWarmUp, bool MatchContinuesOnNextChallenge, bool RestartChallenge);
- TrackMania.BeginRound();
- TrackMania.EndRound();
- TrackMania.StatusChanged(int StatusCode, string StatusName);
- TrackMania.PlayerCheckpoint(int PlayerUid, string Login, int TimeOrScore, int CurLap, int CheckpointIndex);
- TrackMania.PlayerFinish(int PlayerUid, string Login, int TimeOrScore);
- TrackMania.PlayerIncoherence(int PlayerUid, string Login);
- TrackMania.BillUpdated(int BillId, int State, string StateName, int TransactionId);
- TrackMania.TunnelDataReceived(int PlayerUid, string Login, base64 Data);
- TrackMania.ChallengeListModified(int CurChallengeIndex, int NextChallengeIndex, bool IsListModified);
- TrackMania.PlayerInfoChanged(SPlayerInfo PlayerInfo);

      	struct SPlayerInfo {
      		string Login;
      		string NickName;
      		int PlayerId;
      		int TeamId;
      		int SpectatorStatus;
      		int LadderRanking;
      		int Flags;
      	}

- TrackMania.ManualFlowControlTransition(string Transition);