a little cosmetics changes
Merge commit '167a5fc9ddbae8d6a31947a86969172ff699d35b'
added tests for "IsPassable" function (in LabyrinthMatrix class). There is created a matrix with size 3x3 with unpassable block only in the first test. It's for testing returning "false" boolean. The second test creates the same matrix but with passable block only to testing the function for returning "true" boolean