37d18f6b690640f38c39936e146420e33c703d8b doc: sbvar_identification stub, #237

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 435 | PASS: 433 | FAIL: 0 | XFAIL: 2 | XPASS: 0

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 433 | PASS: 431 | FAIL: 0 | XFAIL: 2 | XPASS: 0

A full log can be found on karaba in '/tmp/dynare-master-check-pQjPqg6xev.log'.