* Removed the necessity (for the user) to run stoch_simul bebore
executing the exetended path routine (when options_.init>0).
* The value of options_.ep.init defines the mix (used for the
initialization of the perfect foresight solver) between the previous
perfect foresight solution and the path obtained with an order one
perturbation approach.
* Removed timing related statements.
* Changed homotopy set-up for stochastic extended path: add future
multivariate innovations one by one.
* Endogeneously increase step_length in the homotopy routine.
* Removed homotopy_2 related code.
Sébastien Villemot
Stéphane Adjemian (Charybdis)