Merge pull request #14 from pthedinger/master

Add support for QAV analyser.
Merge pull request #15 from pthedinger/master

Big structure change plus checks for QAV bandwidth.
Add the ability to not check the output of a command.
Add expected sequence for taking the link down.
Cope with actions that happen when the link is down.
Fixes for the port shaper expected behaviour e.g. was incorrectly expecting bandwidth changes on connect when the connection already existed, ...
Adding new config with link down and lots of quick commands.
Fix broken code introduced by restructuring.
Merge git://github.com/xcore/sw_avb_dc