Updated README file with PLACE, EXIT Commands
Adding PLACE command for the Robot which places the Robot Replica on tabletop
Adding a robot simulator class which executes the commands. This class acts as interface between user and robot, table top.
This class contains PLACE command working. This will be enhanced for other commands
updated spec helper to include robot simulator class, added RSPec Configurations
Adding Spec class for testing robot simulator. This contains PLACE command test cases for an initial commit.