Merge pull request #1 from pthedinger/master

Adding auto-test script and first test.
Merge pull request #2 from pthedinger/master

Fixes to the auto test framework.
Updating XTAG IDs for Andy's setup
Fixes missing stream enable check that causes false negative
Adds missing INTERFACE descriptor fields
Adds new interface flags present in ratified AEM
Adding support for the audio analysers.

Add their definition to the test configuration file. Test knows when to expect an audio signal and what frequency it should be depending on the talker/listener that are being connected. Ensures there are no audio glitches.
Tidy of quotes and dead code.
Fix the expected results for stream forwarding when listener already connected.