change launching of login item (at install time) to NSTask, so focus would stay with installer app
fixed issue where activity indicator would overlap with install/uninstall message on macOS Sierra
'Inactive' video and audio notifications are now automatically closed after two seconds
updated code for macOS Sierra (e.g. FaceTime does call CMIO:doWork)
added check to ensure we can get a process's path (which fixed a NULL pointer de-ref)
added 'avconferenced' as a white-listed apple daemon for macOS Sierra
added getOSVersion() function to facilitate macOS Sierra specific logic
added getProcessID() function to get a process name from it's pid
code cleanup/extra debug statements
patrick