Renamed DsgeLikelihood_hh to dsge_likelihood_hh. Fixes bug reported in trac#231.

The problem was that this version of DsgeLikelihhod is called with an eval in dynare_estimation_1
by forming a string.

matlab/DsgeLikelihood_hh.m → matlab/dsge_likelihood_hh.m

-function [fval,llik,cost_flag,ys,trend_coeff,info] = DsgeLikelihood_hh(xparam1,DynareDataset,DynareOptions,Model,EstimatedParameters,BayesInfo,DynareResults)
+function [fval,llik,cost_flag,ys,trend_coeff,info] = dsge_likelihood_hh(xparam1,DynareDataset,DynareOptions,Model,EstimatedParameters,BayesInfo,DynareResults)
 % function [fval,llik,cost_flag,ys,trend_coeff,info] = DsgeLikelihood_hh(xparam1,DynareDataset,DynareOptions,Model,EstimatedParameters,BayesInfo,DynareResults)
 % Evaluates the posterior kernel of a dsge model.
 %