Improved Production Version

Improved stability of the fit.

Stable Production Version

This is a production version of HHKinFit. The reported convergence problems in earlier versions have been studied in detail and have been solved. More detailed status codes enable the user to understand in which mode the fitter converged. For details on the code, see talk by Malte Hoffmann (https://indico.cern.ch/event/343176/session/8/contribution/21/material/slides/0.pdf) or AN-2014/163.