sprayNumber3 now works with PGraphics
Added screen clearing
Implemented drawing on two PGraphics buffers

Known bug: on wallscreen the intermediate knots don't get drawn.
Optimized draw buffer mechanics
Fixed wallscreen spray bug
Merge
Merge remote-tracking branch 'upstream/develop' into develop

Conflicts:
	Code/bombIR/blobs.pde
	Code/bombIR/bombIR.pde
	Code/bombIR/calibration.pde
Solved conflicting files
Merge pull request #48 from SableRaf/develop

Drawing on two PGraphics now works + fixed wall screen bug