major additions to new file. Need to figure out where to put gaussian2D and meshgrid functionalities - it makes more sense to put it in the Jet class since they 'belong' to a jet. However, implementing this does require knowing how to transform (ie: it has a grid), but jets should be independent of their grid transformations. Maybe we need a class that contains both a grid and a jet but that's overkill... seriously.
Most changes are implemented. Just need to write up the algorithm for computing the efficiency (a function) but 'test.py'  shows an example of how you might use it.