Implemented necessary classes and requirements

+ Added Chamber Class
+ Added Chamber types (Dungeon, Hallway, Pitfall, Stairs)
+ CheckInput Class checks whether Hero has Reached stairs
+ Level Number Printout
+ Hero coordinates Printout (For testing purposes)
+ Hero does not walk away from screen anymore (however work in progress)
+ Random generated location for Hero start position
+ Random generated location for stairs
+ Random generated location for pitfall (although Hero detection and
corresponding action on location is not implemented yet, work in
progress)