Move various functions from main matlab folder to subfolders

license.txt

matlab/+identification/analysis.m

matlab/+identification/checks.m

matlab/+identification/fjaco.m

matlab/+identification/get_jacobians.m

matlab/+identification/get_minimal_state_representation.m

matlab/+identification/get_perturbation_params_derivs.m

...tion/get_perturbation_params_derivs_numerical_objective.m

matlab/+identification/hessian_sparse.m

matlab/+identification/numerical_objective.m

matlab/+identification/run.m

matlab/+identification/unfold_g3.m

matlab/+identification/unfold_g4.m

matlab/+identification/vnorm.m

matlab/+mom/objective_function.m

matlab/+osr/objective.m

matlab/+pruned_SS/Q6_plication.m

matlab/+pruned_SS/commutation.m

matlab/+pruned_SS/duplication.m

matlab/+pruned_SS/pruned_state_space_system.m