Viewer Instructions:
Mouse:		Click and move the mouse to pan and tilt
Ctrl & Shift:		While panning, use control and shift keys to zoom in and out.
Arrows:		Alternatively, use the arrow keys for panning and tilting in fixed increments.
< & >:		Use + and -, or > and < keys to zoom in fixed increments.
SPACE:		Press spacebar to unveil hotspot for next image.