##Mars Rover

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

Rules:

• You are given the initial starting point (x,y) of a rover and the direction (N,S,E,W) it is facing.
• The rover receives a character array of commands.
• Implement commands that move the rover forward/backward (f,b).
• Implement commands that turn the rover left/right (l,r).
• Implement wrapping from one edge of the grid to another. (planets are spheres after all)
• Implement obstacle detection before each move to a new square. If a given sequence of commands encounters an obstacle, the rover moves up to the last possible point and reports the obstacle.