Version 0.0.0.0017
  
  ChangeLog. 
  15. Created update method for the Snake class
  16. Changed situation, when it was posible to change direction from east to west, north to south and vise versa
  17. Improved update method in the Snake class. Created new variable distance (pix per iteration)
  
  TO DO LIST 
  - File parser for loader
  - Draw to unactive buttons
  - Create correct start of a game. There is a bag when you first press ESC game begins.
    Maybe to rething the GAME logic in general.
  - Change direction system. There should be two direction horizontal and vertical. Done!
  - Improve update and move methods. Move should be called only when distance > width;
  - Movement of a snake
  - Appearence of a food
  - Processing of eating a food
  - Processing of biting