Mars Rover Kata

Develop an API that moves a rover around on a grid.

Rules:

You are given the initial starting 2D point (x,y) of a rover and the direction (N,S,E,W) it is facing.
The rover receives a character array of commands (String).
- F to move forward
- B to move backward
- L to turn left
- R to turn right
- Z to undo previous command
- Y to redo previously undone command
Use TDD