Added General Purpose function to write an image to disk
Added General Purpose function to write an image to disk

fabienmomey/RTK,fabienmomey/RTK,fabienmomey/RTK,SimonRit/RTK,fabienmomey/RTK,SimonRit/RTK,SimonRit/RTK,fabienmomey/RTK,SimonRit/RTK,fabienmomey/RTK,fabienmomey/RTK