Update of lifetime fit
Some updates of the lifetime fit in DistanceCalculator:
- fixed bug with non-symmetric matrix introduced in migration from Smatrix. This addresses: #265
- simplified convergence criterion
- reduced max number of iterations to 5 (most converge in 2; those that don't are bad fits)
- gained one iteration by terminating break after updating parameters
In addition, added new alg that leads to same result, but should be quicker. Will not use that until we can prove it.
Edited by Wouter Hulsbergen