Stack Class

Added Basic Stack Class
Revert "Stack Class"

This reverts commit c57a90f3b5b322e1e7278ca185aa330715537a5a.
implemented the grid. Routers can now be placed on a grid and moved
Merge branch 'master' of https://github.com/CS2303-Team5J/Program5
Merge pull request #1 from CS2303-Team5J/Partner

Stack Update
fixed bug where bouncing off the wall causing no movement and added the grid to the router so it can cycle on its own.
Merge branch 'master' of https://github.com/CS2303-Team5J/Program5
started creating a class that generalizes the sim nodes (router, receiver, host)
Merge pull request #2 from CS2303-Team5J/master

Caught up with