eae9f688c5a94993d036234a2d44d7aed7808728 preprocessor: add weibull and weibull_pdf options for estimation and new estimation, #520

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 501 | PASS: 492 | FAIL: 6 | XFAIL: 3 | XPASS: 0 | LIST OF FAILED TESTS: | * simul/Solow_no_varexo.mod | * kalman_filter_smoother/check_variable_dimensions/fs2000_ML.mod | * ep/rbc.mod | * ep/rbcii.mod | * deterministic_simulations/homotopy.mod | * forecast/Hansen_exo_det_forecast.mod

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 495 | PASS: 485 | FAIL: 7 | XFAIL: 3 | XPASS: 0 | LIST OF FAILED TESTS: | * simul/Solow_no_varexo.mod | * kalman_filter_smoother/check_variable_dimensions/fs2000_ML.mod | * ep/rbc.mod | * ep/rbcii.mod | * deterministic_simulations/homotopy.mod | * forecast/Hansen_exo_det_forecast.mod | * ../matlab/lyapunov_symm.m#1

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