tests: fixed wrong permanent structure for battlefield cards (addCard command);
tests: added docs and additional runtime checks;
game: Modal double-faced cards - improved support, no more other side effects on battlefield;
game: Copy abilities - improved stability and cards support;
game: Player under control - improved stability and related cards support (possible NPE errors, additional runtime checks);
server: fixed bloated logs with game timer;
AI: fixed wrong timer in computer games;
