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Chess engine: Rubichess 20220813 NNUE

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RubiChess -  UCI chess engine, Rating CEDR=3295
Author - Andreas Matthies

v.20220813 (release 2022-08-13) :
    - Time management improvements:
        + Plays movetime mode respecting move overhead
        + More flexible time usage depending on nodes spending on best move
        + Plays very short time controls like 1+0.001 without time forfeits now
        + Better support for nodes based time control
        + Avoid getting low on time in moves/time control
    - New default network nn-b1c332ae1d-20220613.nnue
    - Improve endgame draw detection when playing withou tablebase
    - Contempt (default 0) and rating based contempt (triggered by GUI using UCI_RatingAdv)
    - Improved logging ('..._app' for appending, '..._pid' for concurrent loggin using the process id)
    - Speed improvements (1-3% on x86, > 10% on Arm/Neon)
    - Several fixes
Maybe +20 Elo compared to 20220223.

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