added makeWalls method
attempt for drawing of the walls (not working yet)
added wall visualisation
methods for nearest point to entity center and collision check
added findCellIDs and findCellsForLine methods
Fixed getCellsfromLine method. To do so I had to add getBoundingBoxCornersand getSetFromCorners methods
collisionCheck refactoring
removed the WallManager. The walls are now managed by the entManager directly
now getting the wall list from EntityManager instance
getObjectsFromCellSet method addition
moved collision check to entity manager
added management and collision detection for wall objects (lines)
drawWalls correction