Merged upstream/master
EA_TEST Wrote first tests for 3.15.4
EA_TEST Fixed handling of reversing packets
EA_TEST Completed tests for 3.15.4 (covers part of 5.13)
EA_TEST Wrote tests for 5.13.6 and 5.13.7
EA_TEST Marked tested requirements as tested
EA_TEST Fixing the tests
EA_TEST Tests complete and model fixed
Merge pull request #444 from JamesOakey/OBTestChap3

Ok, merged!