Preparing code for class extraction

Replaced repeating rows in DisplayLabyrinth method with for loop;
Implemented IsOutOfLabyrinth bool method instead of unappropriate use of
try - catch(Exeption);
Removed "magic numbers" form for loop in LabyrinthGenerator method and
replaced with more appropriate labyrinth.GetLength;
Removed "side effect" of filling labyrinth array with random numbers.
Implemented if - else condiotional statement;
Renamed unappropriate classname "Scoreboard" to "Player";