799ce399f564378d7a6557e5cc1741b02c15873a doc: some changes to dseries portion of slides, following Stéphane’s slides

================================ DYNARE MAKE CHECK MATLAB RESULTS ================================ | TOTAL: 444 | PASS: 438 | FAIL: 4 | XFAIL: 2 | XPASS: 0 | LIST OF FAILED TESTS: | * ep/rbc.mod | * ep/rbc2.mod | * ep/rbcii.mod | * ep/linearmodel.mod

================================ DYNARE MAKE CHECK OCTAVE RESULTS ================================ | TOTAL: 442 | PASS: 436 | FAIL: 4 | XFAIL: 2 | XPASS: 0 | LIST OF FAILED TESTS: | * ep/rbc.mod | * ep/rbc2.mod | * ep/rbcii.mod | * ep/linearmodel.mod

A full log can be found on karaba in '/tmp/dynare-master-check-9PWVndZBLn.log'.