2e4a52d69f729b7ffed54ede4807f4ce1e6f5775 osr: add tolf option closes #423

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 200 | PASS: 199 | FAIL: 0 | XFAIL: 1 | XPASS: 0

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 198 | PASS: 197 | FAIL: 0 | XFAIL: 1 | XPASS: 0

A full log can be found on karaba in '/tmp/dynare-master-check-YFpqfe7gXs.log'.