Fixed blocking/nonblocking definitions for queue access and added audio to OT
prototyped in the old OT live_meanshift.py and object_match.py to determine how to correctly define blocking and non blocking access to the mutliple threads, in the process gave the old demos the ability to play sound files; also fixed the selection for height sound so it indexes from the right direction
Merge branch 'master' of https://github.com/occamLab/eye-helper-cv