3171e8744867b3dd165b71fb3cb37b9cfcc54482 fixing logic in creation of checksum file. Improving documentation.

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 528 | PASS: 503 | FAIL: 22 | XFAIL: 3 | XPASS: 0 | LIST OF FAILED TESTS: | * estimation/MH_recover/fs2000_recover.mod | * estimation/t_proposal/fs2000_student.mod | * example1_use_dll.mod | * example1_abs_sign.mod | * ramst_normcdf_and_friends.mod | * steady_state_operator/use_dll.mod | * k_order_perturbation/fs2000k2_use_dll.mod | * k_order_perturbation/fs2000k_1_use_dll.mod | * k_order_perturbation/fs2000k3_use_dll.mod | * external_function/first_and_2nd_deriv_fcns_provided_dll.mod | * external_function/first_deriv_fcn_provided_dll.mod | * external_function/no_deriv_fcns_provided_dll.mod | * simul/simul_ZLB_purely_forward_no_solution.mod | * ms-dsge/test_ms_dsge.mod | * ep/rbc.mod | * ep/rbc2.mod | * ep/rbcii.mod | * ep/linearmodel.mod | * deterministic_simulations/rbc_det6.mod | * deterministic_simulations/sim_several_leads_lags.mod | * walsh.mod | * run_reporting_test_matlab.m

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 522 | PASS: 508 | FAIL: 11 | XFAIL: 3 | XPASS: 0 | LIST OF FAILED TESTS: | * estimation/MH_recover/fs2000_recover.mod | * initval_file/ramst_initval_file.mod | * k_order_perturbation/fs2000k_1_m.mod | * simul/simul_ZLB_purely_forward_no_solution.mod | * recursive/ls2003_bayesian_xls.mod | * deterministic_simulations/rbc_det6.mod | * deterministic_simulations/sim_several_leads_lags.mod | * optimizers/fs2000_7.mod | * run_reporting_test_octave.m | * ../matlab/lyapunov_symm.m#1 | * ../matlab/utilities/general/name2tex.m#4

A full log can be found on karaba in '/tmp/dynare-master-check-gJWSPubBQX.log'.