Displays from:
- Real-time device camera stream
- Online "Big Buck Bunny" stream
- Local "Al Jazeera" news clip
- Main - standard entry point to run program
- MainWindow - the window that instantiates and arranges all three QLabel displays and Stream objects, and connects their signals and slots
- Stream - a QThread that is instantiated with one of the above sources, reads frame from the source, and converts frame to appropriate format for subsequent display