Enforced typedefs in samples and tests
Cleaned up tracking update and ensure grayscale
Tidied up detection trigger stuff in find()
Added multithreaded detection trigger enums
Initial background detection prototypes
Implemented BACKGROUND_DETECT_ALWAYS prototype
Replaced busy wait with condition wait in detection
Added background detection sample
Typo corrections, ameliorations, updates
Changed BACKGROUND to ASYNC
Thread error message
Removed current frame copy in Track
Changed async thread timing
Removed tag list member copy when single threaded detection
Don't pass tags to detection when async
Replaced tag update code
Moved opencv utility header include to Detect source