Generate the data instead with matlab's script
ramst_initval_file_data.m. Note that the excel files are only produced
and tested under Windows (xlswrite is not working on OS X, need to check
for Linux).

Fixed conflict related to the move of the perfect foresight related routines
in a subfolder.

Add missing abs to unit root check in model_diagnostics.m

Estimation bugfixes

Add unit test for newrat with analytic derivatives and various Kalman al...

Integrate error from negative steady state with loglinear model into pri...

Fixes crash in master unit test

Finalizes  39248627

  Use new routine for minimizing objective function for OSR

This new routine gives the possibility to obtain a description of the
prior from the command line.

>> prior table

will display a table with the prior mean, prior mode, prior std, prior
bounds and prior HPD interval.

>> prior plot

will plot the prior densities.

>> prior optimize

will trigger the maximization of the prior density and display the
results (often, because of BK conditions or other issues, Dynare is even
not able to get the prior mode).

>> prior moments

will display the moments of the endogenous variables at the prior mode.

>> prior simulate

will run a Monte-Carlo, by sampling from the prior and discarding vector
of parameters such that the steady state does not exist or the BK
conditions are not met, and return an estimate of the effective prior
mass.

modes (return the first mode).

lb and ub (lower and upper bounds for the priors) are no more fields of
bayestopt_ structure.

test system: rename ramsey.mod as ramsey_.mod to avoid removal of ramsey directory when doing make clean

It is more standard to have the name of the routine (defining the
objective to be minimized) as a first argument.