Added saturation and volume control for RGB-LED (spin dial).
Added per pin reset/hide feature to pin mode dialog.
Reworked pin placement for QVGA screens.
Adjusted instructions to make it resolution independent.
For this swapped color code for digitalRead and digitalWrite, 
to be consistent with the D7 sample on instruction screen (cyan ->
digitalWrite -> blue LED on D7).

Experimental CameraView for picking color for RGB-LED (not active yet).

Still some code cleanup required.