Synthetic resolution test example

Adds an example in the example directory to run a resolution test.
By default resolution is evaluated at every point in the search grid. The user can decimate the resolution test to optimize for speed. Resolution criteria are : (1) distance in km between true location and waveloc location (if more than one location is found, then only the one with the highest max_value is kept) ; (2) number of locations found by waveloc ; (3) origin time difference (waveloc - true).