Maze class

Set up simple class variables.
Added create maze walls that creates the outer walls for the maze
placing 'X' characters in Nodes and placing those nodes in the entire
border of the 2-D array
Node class

Set up simple class variables to indicate what position the node is in ,
The character value which represents the standing of the node in the
maze . I.e... if the node is a Wall 'X' or Oliver the mouse 'O'......
Added constructors to except position X,Y on a coordinate plane and a
character to represent the standing of the node in the maze
spelling fix

fixed spelling in comments
Add class variable

added was visited variable to check if oliver did go over that space yet
Merge remote-tracking branch 'origin/Maze-Class' into Assignment-2