Assignment:  ** PANORAMA-RAMA **

  1) Write a program so that the robot takes
     a series of overlapping pictures as it
     rotates in place.

  2) Write a function that takes two images and
     determines where they best OVERLAP. Consider
     only horizontal translations.

  3) Using the computed overlaps from the original
     sequence of pictures, create a 360-degree panorama
     from the robot's images.

  4) EXTRA! Create a robot "compass": given a NEW image,
     determine which direction the robot is facing
     relative to the constructed panorama.