Labyrinth restyled
no anti aliasing for labyrinth walls
Labyrinth Items as enum.

Some simple methods isWall/isNotWall can now be deined there. New Item
type - HORIZONTAL_WALL does not have round corners and can be used on
the boundary to the teleportation cell.
Labyrinth drawing performance

do not create new objects during drawing. All bounds are reserved on
init.
Try to decouple drawing aspect from the Labrinth