Useful Scripts

Until now, we would usually set a fixed value for the truncation
radius of profile in MakeProfiles. But to be as accurate as possible
(while being computationally possible for large catalogs), it is
necessary to set custom truncations for each profile.

With this commit, a Makefile has been added for this job: estimating
the best truncation radius as a function of effective radius, sersic
index and magnitude.