tholden/dynareOBC: DynareOBC v2.12.1512

This is a minor release. Changes follow: Bug fix for models including non-standard functions (e.g. erf) when invoked with the sparse command line option. Compatibility with Dynare 4.5.0. Major performance improvements to RetrieveConditionalCovariances for large models. On one extreme example, this function was sped up from around 2000 seconds per call to around 80 seconds per call. New option RetrieveConditionalCovariancesParallelizationCutOff which gives control of when RetrieveConditionalCovariances is parallelized. Updated YALMIP and the OptiToolbox. Simplifications to internal logic