remove unused blend() calls
add EXCLUSION blendMode to screen image capture feed
Cleanup of some unused code.

capturer ready for setLocation(x,y).
Add drawDebug flag in globals
Tint of bgCloudsImage now sin()'ing to create fadein/out effect with shadows.

Note the range of the tint: 0 to 103. This is based on personal eyeing of optimum tint value to interpolate between.
Switch to testImage.jpg to simulate the real conditions of the installation. Use blendMode(LIGHTEST) for testImage.